485BPOS

Registration No. 333-185116

File No. 811-22771

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	o
Post-Effective Amendment No. 3	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 5	x

Oppenheimer Global Real Estate Fund

(Exact Name of Registrant as Specified in Charter)

6803 South Tucson Way, Centennial, Colorado 80112-3924

(Address of Principal Executive Offices)       (Zip Code)

(303) 768-3200
(Registrant’s Telephone Number, including Area Code)

Arthur S. Gabinet, Esq.

OFI Global Asset Management, Inc.

Two World Financial Center, 225 Liberty Street, 11^th Floor, New York, New York 10281-1008

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):

x immediately upon filing pursuant to paragraph (b)

o on pursuant to paragraph (b)

o 60 days after filing pursuant to paragraph (a)(1)

o on _______________ pursuant to paragraph (a)(1)

o 75 days after filing pursuant to paragraph (a)(2)

o on _______________ pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:
 

o this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York on the 12th day of September, 2013.

OPPENHEIMER GLOBAL REAL ESTATE FUND
By:	William F. Glavin, Jr.*
	William F. Glavin, Jr., President, Principal Executive Officer and Trustee

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities on the dates indicated:

Signatures	Title	Date
Brian F. Wruble*	Chairman of the	September 12, 2013
Brian F. Wruble	Board of Trustees
William F. Glavin, Jr.*	President, Principal	September 12, 2013
William F. Glavin, Jr.	Executive Officer and Trustee
Brian W. Wixted*	Treasurer, Principal	September 12, 2013
Brian W. Wixted	Financial & Accounting Officer
David K. Downes*	Trustee	September 12, 2013
David K. Downes
Matthew P. Fink*	Trustee	September 12, 2013
Matthew P.Fink
Edmund P. Giambastiani, Jr.*	Trustee	September 12, 2013
Edmund P. Giambastiani, Jr.
Phillip A. Griffiths*	Trustee	September 12, 2013
Phillip A. Griffiths
Mary F. Miller*	Trustee	September 12, 2013
Mary F. Miller
Joel W. Motley*	Trustee	September 12, 2013
Joel W. Motley
Joanne Pace*	Trustee	September 12, 2013
Joanne Pace
Mary Ann Tynan*	Trustee	September 12, 2013
Mary Ann Tynan
Joseph M. Wikler*	Trustee	September 12, 2013
Joseph M. Wikler
Peter I. Wold*	Trustee	September 12, 2013
Peter I. Wold

*By:	/s/ Mitchell J. Lindauer
	Mitchell J. Lindauer, Attorney-in-Fact

EXHIBIT INDEX

Exhibit No.	Description
Ex-101.INS	XBRL Instance Document
Ex-101.SCH	XBRL Taxonomy Extension Schema Document
Ex-101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
Ex-101.DEF	XBRL Taxonomy Extension Definition Linkbase
Ex-101.LAB	XBRL Taxonomy Extension Labels Linkbase
Ex-101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

XML

(Oppenheimer Global Real Estate Fund)

Investment Objective. The Fund seeks total return.

Fees and Expenses of the Fund. This table describes the fees and expenses that you may pay if you buy and hold or redeem shares of the Fund. You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $25,000 in certain funds in the Oppenheimer family of funds. More information about these and other discounts is available from your financial professional and in the section "About Your Account" beginning on page 10 of the prospectus and in the sections "How to Buy Shares" beginning on page 54 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Global Real Estate Fund)	Class A	Class C	Class N	Class Y	Class I
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	5.75%	none	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	1.00%	1.00%	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

^[1]

Annual Fund Operating Expenses (Oppenheimer Global Real Estate Fund)		Class A	Class C	Class N	Class Y	Class I
Management Fees		1.00%	1.00%	1.00%	1.00%	1.00%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	0.50%	none	none
Other Expenses	[1]	0.25%	0.25%	0.25%	0.25%	0.06%
Total Annual Fund Operating Expenses		1.50%	2.25%	1.75%	1.25%	1.06%
Fee Waiver and/or Expense Reimbursement	[2]	(0.05%)	none	none	(0.15%)	(0.01%)
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement		1.45%	2.25%	1.75%	1.10%	1.05%

Example. The following Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in a class of shares of the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your expenses would be as follows:

If shares are redeemed

Expense Example (Oppenheimer Global Real Estate Fund) (USD $)	1 Year	3 Years
Class A	715	1,020
Class C	331	711
Class N	279	556
Class Y	113	384
Class I	108	338

If shares are not redeemed

Expense Example, No Redemption (Oppenheimer Global Real Estate Fund) (USD $)	1 Year	3 Years
Class A	715	1,020
Class C	231	711
Class N	179	556
Class Y	113	384
Class I	108	338

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund's performance.

During the period from the Fund's inception of March 20, 2013 to the end of its fiscal year of April 30, 2013, the Fund's portfolio turnover rate was 2% of the average value of its portfolio.

Principal Investment Strategies. Under normal market conditions, the Fund invests at least 80% of its net assets (including borrowings for investment purposes) in common stocks and other equity securities of real estate companies. The Fund invests in a number of different countries throughout the world, including the U.S. Under normal market conditions, the Fund will invest a significant portion of its assets (generally 40% or more) in equity securities of real estate companies domiciled outside of the U.S. or having a majority of their assets or real estate activities outside of the U.S. The Fund's foreign investments may include securities of both developed and emerging markets.

The Fund considers a real estate company to be one that derives at least 50% of its revenues from, or invests at least 50% of its assets in, the ownership, construction, financing, management or sale of commercial, industrial or residential real estate. The Fund focuses on real estate investment trusts ("REITs") and international REIT-like entities and real estate operating companies ("REOCs"). International REIT-like entities are organized outside of the U.S. and have operations and receive tax treatment in their respective countries similar to that of U.S. REITs. The assets of the REITs, international REIT-like entities and REOCs that the Fund invests in are primarily land and buildings, although the Fund may invest in REITs and international REIT-like entities that hold mortgages or a combination of investment types. The Fund may buy securities issued by companies of any size or market capitalization range and at times might increase its emphasis on securities of issuers in a particular capitalization range.

The portfolio manager employs both top-down and bottom-up methods in selecting securities for the Fund.

Top-Down Analysis. The Fund's portfolio managers are employed by the Fund's sub-sub-adviser, Cornerstone Real Estate Advisers LLC (the "Sub-Sub-Adviser"), which has in-house real estate experts who can provide field observations regarding national and international real estate trends and fundamentals in support of the top-down analysis. The Sub-Sub-Adviser also has comprehensive property databases that track the real estate markets by property type, geographic area and company portfolio. This allows the portfolio managers to use proprietary models to analyze markets at various levels, including Standard Industrial Classification code, zip code and Metropolitan Statistical Area, resulting in comprehensive industry databases.

The Fund's top-down portfolio weightings are determined by a geographic market analysis of the following factors:

• Projected total return of investment opportunities.

• Projected regional and country growth in macro-economic factors, including, among other macro-economic factors, Gross Domestic Product, supply and demand, employment, demographics, and political and policy-related factors.

• Property market factors, including, but not limited to, new development of commercial and residential buildings, changing demand for real estate, changing utilization of current supply of real estate, propensity to own versus to rent, and changes in household formation.

Bottom-Up Analysis. The portfolio managers' bottom-up analysis uses traditional equity analysis to assess an individual real estate company's portfolio, current business strategy, capital structure and management track record. Specifically, the portfolio manager looks for companies with the following characteristics:

• Capacity for predictable and sustainable growth in revenue and earnings per share.

• Dominant owner/operator in its property types and geographic markets.

• Property holdings poised for potentially higher growth due to management's strategic positioning or due to geographic locations in markets where land suitable for development is scarce.

• Strong capital structure and access to capital that may help to effect long-term business strategies.

• Experienced senior management with a strong track record and a wide spectrum of industry-specific skills.

• Attractive valuation relative to other companies and to historical valuations in the real estate market.

Principal Risks. The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or because of poor investment selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. These risks mean that you can lose money by investing in the Fund.

Real Estate Market Risks. The Fund's performance is closely linked to the performance of the real estate markets. Property values or revenues from real estate investments may fall due to many different factors, including: market disruptions, increased vacancies or declining rents, negative economic developments affecting businesses or individuals, increased real estate operating costs, low demand, oversupply, obsolescence, competition, uninsured casualty losses, condemnation losses, environmental liabilities, the failure of borrowers to repay loans in a timely manner, changes in prevailing interest rates or rates of inflation, lack of available credit or changes in federal or state taxation policies affecting real estate and global economic conditions. The price of a real estate company's securities may also drop because of dividend reductions, lowered credit ratings, poor company management, or other factors that affect companies in general. Real estate companies, including REITs and REOCs, tend to be small- and mid-cap companies and their shares may be more volatile and less liquid.

Smaller Real Estate Company Risks. Smaller companies are typically subject to greater risk of loss than larger companies. They may be more sensitive to changes in a company's earnings expectations and may experience more price volatility. Smaller companies' securities often trade in lower volumes and may be harder to sell at an acceptable price. Buy and sell transactions in a smaller company's stock could impact the stock's price more than it would a larger company's stock. Smaller real estate companies may have limited access to financial and other resources and lack liquidity in a declining market. They may have unseasoned management and may be more sensitive to changes in management or depth of management skill than larger, more established companies.

Main Risks of Investing in Stock. The value of the Fund's portfolio may be affected by changes in the stock markets. Stock markets may experience significant short-term volatility and may fall sharply at times. Different stock markets may behave differently from each other and U.S. stock markets may move in the opposite direction from one or more foreign stock markets.

The prices of individual stocks generally do not all move in the same direction at the same time and a variety of factors can affect the price of a particular company's stock. These factors may include, but are not limited to: poor earnings reports, a loss of customers, litigation against the company, general unfavorable performance of the company's sector or industry, or changes in government regulations affecting the company or its industry.

Main Risks of Investing in REITs. REITs are dependent upon the quality of their management and may not be diversified geographically or by property type. REITs whose underlying properties are concentrated in a particular industry or geographic region are subject to risks affecting such industries and regions. REITs generally tend to be small- to mid-cap stocks and are subject to risks of investing in those securities, including limited financial resources and dependency on heavy cash flow. REITs must satisfy certain requirements in order to qualify for favorable tax treatment under applicable tax laws, and a failure to qualify could adversely affect the value of the REIT. REITs are also subject to the risk that governments or regulatory authorities may take legislative and other regulatory actions that could adversely affect the status of REITs. By investing in REITs through the Fund, a shareholder will bear expenses of the REITs in addition to expenses of the Fund.

Main Risks of Foreign Investing. Foreign securities are subject to special risks. Foreign issuers are usually not subject to the same accounting and disclosure requirements that U.S. companies are subject to, which may make it difficult for the Fund to evaluate a foreign company's operations or financial condition. A change in the value of a foreign currency against the U.S. dollar will result in a change in the U.S. dollar value of securities denominated in that foreign currency and in the value of any income or distributions the Fund may receive on those securities. The value of foreign investments may be affected by exchange control regulations, foreign taxes, higher transaction and other costs, delays in the settlement of transactions, changes in economic or monetary policy in the United States or abroad, expropriation or nationalization of a company's assets, or other political and economic factors. These risks may be greater for investments in developing or emerging market countries.

Special Risks of Developing and Emerging Markets. The economies of developing or emerging market countries may be more dependent on relatively few industries that may be highly vulnerable to local and global changes. The governments of developing and emerging market countries may also be more unstable than the governments of more developed countries. These countries generally have less developed securities markets or exchanges, and less developed legal and accounting systems. Securities may be more difficult to sell at an acceptable price and may be more volatile than securities in countries with more mature markets. The value of developing or emerging market currencies may fluctuate more than the currencies of countries with more mature markets. Investments in developing or emerging market countries may be subject to greater risks of government restrictions, including confiscatory taxation, expropriation or nationalization of a company's assets, restrictions on foreign ownership of local companies and restrictions on withdrawing assets from the country. Investments in securities of issuers in developing or emerging market countries may be considered speculative.

Special Risks of Foreign Real Estate Investments. Because real estate trends are cyclically unique to different countries and world regions, an up or down real estate market in the U.S. may not coincide with the trend in another country. Fluctuations in the relation of a foreign currency to the U.S. dollar could adversely impact cash flow and profits of real estate companies, which in turn could negatively impact the Fund's performance and ability to pay dividends. Securities of foreign real estate companies may have less trading volume, may lack the level of transparency generally present in U.S. companies, and may be more sensitive to volatility. In emerging markets in particular, real estate ownership laws, land rights and tax laws are subject to rapid and unexpected changes as a result of regulatory and political changes. Foreign real estate investments in those countries are more susceptible to the imposition of adverse or confiscatory taxes on foreign properties, currency transfer restrictions, expropriation and difficulty in enforcing obligations.

Concentration Risk. Concentration risk is the risk that the Fund's investments in the securities of companies in one industry will cause the Fund to be more exposed to developments affecting a single industry or market sector than a more broadly diversified fund would be.

Because the Fund invests primarily in real estate securities, the Fund may perform poorly during a downturn in that industry.

Risks of Non-Diversification. The Fund is classified as a "non-diversified" fund under the Investment Company Act of 1940. Accordingly, the Fund may invest a greater portion of its assets in the securities of a single issuer than if it were a "diversified" fund. To the extent that the Fund invests a higher percentage of its assets in the securities of a single issuer, the Fund is more subject to the risks associated with and developments affecting that issuer than a fund that invests more widely.

Who Is the Fund Designed For? The Fund is designed for investors seeking to diversify their investments by adding foreign and U.S. real estate securities to their portfolios. Investors should be willing to assume the risks of a fund that invests in real estate for potential current income and long-term capital growth. Because the Fund's income level will fluctuate, the Fund is not designed for investors needing an assured level of income. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

The Fund's Past Performance. Because the Fund recently commenced operations, prior performance information for a full calendar year is not yet available. While the Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future, updated performance information, showing the variability of the Fund's returns, is available by calling the toll-free number on the back of the prospectus and on the Fund's website at: https://www.oppenheimerfunds.com/fund/investors/overview/GlobalRealEstateFund

[1] "Other Expenses" are based on estimated amounts for the Fund's current fiscal year.

[2] After discussions with the Fund's Board, the Manager has contractually agreed to waive fees and/or reimburse the Fund for certain expenses in order to limit "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" (excluding any applicable dividend expense, taxes, interest and fees from borrowing, any subsidiary expenses, Acquired Fund Fees and Expenses, brokerage commissions, extraordinary expenses and certain other Fund expenses) to annual rates of 1.45% for Class A shares, 2.25% for Class C shares, 1.75% for Class N shares, 1.10% for Class Y shares and 1.05% for Class I shares as calculated on the daily net assets of the Fund. This fee waiver and/or expense reimbursement may not be amended or withdrawn for one year from the date of this prospectus, unless approved by the Board.

[1] Expenses have been restated to reflect current fees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Investment Objective. The Fund seeks total return.

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

Fees and Expenses of the Fund. This table describes the fees and expenses that you may pay if you buy and hold or redeem shares of the Fund. You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $25,000 in certain funds in the Oppenheimer family of funds. More information about these and other discounts is available from your financial professional and in the section "About Your Account" beginning on page 10 of the prospectus and in the sections "How to Buy Shares" beginning on page 54 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

^[1]

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Example. The following Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in a class of shares of the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your expenses would be as follows:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If shares are redeemed

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

2.00%

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund's performance.

During the period from the Fund's inception of March 20, 2013 to the end of its fiscal year of April 30, 2013, the Fund's portfolio turnover rate was 2% of the average value of its portfolio.

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal Investment Strategies. Under normal market conditions, the Fund invests at least 80% of its net assets (including borrowings for investment purposes) in common stocks and other equity securities of real estate companies. The Fund invests in a number of different countries throughout the world, including the U.S. Under normal market conditions, the Fund will invest a significant portion of its assets (generally 40% or more) in equity securities of real estate companies domiciled outside of the U.S. or having a majority of their assets or real estate activities outside of the U.S. The Fund's foreign investments may include securities of both developed and emerging markets.

The Fund considers a real estate company to be one that derives at least 50% of its revenues from, or invests at least 50% of its assets in, the ownership, construction, financing, management or sale of commercial, industrial or residential real estate. The Fund focuses on real estate investment trusts ("REITs") and international REIT-like entities and real estate operating companies ("REOCs"). International REIT-like entities are organized outside of the U.S. and have operations and receive tax treatment in their respective countries similar to that of U.S. REITs. The assets of the REITs, international REIT-like entities and REOCs that the Fund invests in are primarily land and buildings, although the Fund may invest in REITs and international REIT-like entities that hold mortgages or a combination of investment types. The Fund may buy securities issued by companies of any size or market capitalization range and at times might increase its emphasis on securities of issuers in a particular capitalization range.

The portfolio manager employs both top-down and bottom-up methods in selecting securities for the Fund.

Top-Down Analysis. The Fund's portfolio managers are employed by the Fund's sub-sub-adviser, Cornerstone Real Estate Advisers LLC (the "Sub-Sub-Adviser"), which has in-house real estate experts who can provide field observations regarding national and international real estate trends and fundamentals in support of the top-down analysis. The Sub-Sub-Adviser also has comprehensive property databases that track the real estate markets by property type, geographic area and company portfolio. This allows the portfolio managers to use proprietary models to analyze markets at various levels, including Standard Industrial Classification code, zip code and Metropolitan Statistical Area, resulting in comprehensive industry databases.

The Fund's top-down portfolio weightings are determined by a geographic market analysis of the following factors:

• Projected total return of investment opportunities.

• Projected regional and country growth in macro-economic factors, including, among other macro-economic factors, Gross Domestic Product, supply and demand, employment, demographics, and political and policy-related factors.

• Property market factors, including, but not limited to, new development of commercial and residential buildings, changing demand for real estate, changing utilization of current supply of real estate, propensity to own versus to rent, and changes in household formation.

Bottom-Up Analysis. The portfolio managers' bottom-up analysis uses traditional equity analysis to assess an individual real estate company's portfolio, current business strategy, capital structure and management track record. Specifically, the portfolio manager looks for companies with the following characteristics:

• Capacity for predictable and sustainable growth in revenue and earnings per share.

• Dominant owner/operator in its property types and geographic markets.

• Property holdings poised for potentially higher growth due to management's strategic positioning or due to geographic locations in markets where land suitable for development is scarce.

• Strong capital structure and access to capital that may help to effect long-term business strategies.

• Experienced senior management with a strong track record and a wide spectrum of industry-specific skills.

• Attractive valuation relative to other companies and to historical valuations in the real estate market.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Principal Risks. The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or because of poor investment selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. These risks mean that you can lose money by investing in the Fund.

Real Estate Market Risks. The Fund's performance is closely linked to the performance of the real estate markets. Property values or revenues from real estate investments may fall due to many different factors, including: market disruptions, increased vacancies or declining rents, negative economic developments affecting businesses or individuals, increased real estate operating costs, low demand, oversupply, obsolescence, competition, uninsured casualty losses, condemnation losses, environmental liabilities, the failure of borrowers to repay loans in a timely manner, changes in prevailing interest rates or rates of inflation, lack of available credit or changes in federal or state taxation policies affecting real estate and global economic conditions. The price of a real estate company's securities may also drop because of dividend reductions, lowered credit ratings, poor company management, or other factors that affect companies in general. Real estate companies, including REITs and REOCs, tend to be small- and mid-cap companies and their shares may be more volatile and less liquid.

Smaller Real Estate Company Risks. Smaller companies are typically subject to greater risk of loss than larger companies. They may be more sensitive to changes in a company's earnings expectations and may experience more price volatility. Smaller companies' securities often trade in lower volumes and may be harder to sell at an acceptable price. Buy and sell transactions in a smaller company's stock could impact the stock's price more than it would a larger company's stock. Smaller real estate companies may have limited access to financial and other resources and lack liquidity in a declining market. They may have unseasoned management and may be more sensitive to changes in management or depth of management skill than larger, more established companies.

Main Risks of Investing in Stock. The value of the Fund's portfolio may be affected by changes in the stock markets. Stock markets may experience significant short-term volatility and may fall sharply at times. Different stock markets may behave differently from each other and U.S. stock markets may move in the opposite direction from one or more foreign stock markets.

The prices of individual stocks generally do not all move in the same direction at the same time and a variety of factors can affect the price of a particular company's stock. These factors may include, but are not limited to: poor earnings reports, a loss of customers, litigation against the company, general unfavorable performance of the company's sector or industry, or changes in government regulations affecting the company or its industry.

Main Risks of Investing in REITs. REITs are dependent upon the quality of their management and may not be diversified geographically or by property type. REITs whose underlying properties are concentrated in a particular industry or geographic region are subject to risks affecting such industries and regions. REITs generally tend to be small- to mid-cap stocks and are subject to risks of investing in those securities, including limited financial resources and dependency on heavy cash flow. REITs must satisfy certain requirements in order to qualify for favorable tax treatment under applicable tax laws, and a failure to qualify could adversely affect the value of the REIT. REITs are also subject to the risk that governments or regulatory authorities may take legislative and other regulatory actions that could adversely affect the status of REITs. By investing in REITs through the Fund, a shareholder will bear expenses of the REITs in addition to expenses of the Fund.

Main Risks of Foreign Investing. Foreign securities are subject to special risks. Foreign issuers are usually not subject to the same accounting and disclosure requirements that U.S. companies are subject to, which may make it difficult for the Fund to evaluate a foreign company's operations or financial condition. A change in the value of a foreign currency against the U.S. dollar will result in a change in the U.S. dollar value of securities denominated in that foreign currency and in the value of any income or distributions the Fund may receive on those securities. The value of foreign investments may be affected by exchange control regulations, foreign taxes, higher transaction and other costs, delays in the settlement of transactions, changes in economic or monetary policy in the United States or abroad, expropriation or nationalization of a company's assets, or other political and economic factors. These risks may be greater for investments in developing or emerging market countries.

Special Risks of Developing and Emerging Markets. The economies of developing or emerging market countries may be more dependent on relatively few industries that may be highly vulnerable to local and global changes. The governments of developing and emerging market countries may also be more unstable than the governments of more developed countries. These countries generally have less developed securities markets or exchanges, and less developed legal and accounting systems. Securities may be more difficult to sell at an acceptable price and may be more volatile than securities in countries with more mature markets. The value of developing or emerging market currencies may fluctuate more than the currencies of countries with more mature markets. Investments in developing or emerging market countries may be subject to greater risks of government restrictions, including confiscatory taxation, expropriation or nationalization of a company's assets, restrictions on foreign ownership of local companies and restrictions on withdrawing assets from the country. Investments in securities of issuers in developing or emerging market countries may be considered speculative.

Special Risks of Foreign Real Estate Investments. Because real estate trends are cyclically unique to different countries and world regions, an up or down real estate market in the U.S. may not coincide with the trend in another country. Fluctuations in the relation of a foreign currency to the U.S. dollar could adversely impact cash flow and profits of real estate companies, which in turn could negatively impact the Fund's performance and ability to pay dividends. Securities of foreign real estate companies may have less trading volume, may lack the level of transparency generally present in U.S. companies, and may be more sensitive to volatility. In emerging markets in particular, real estate ownership laws, land rights and tax laws are subject to rapid and unexpected changes as a result of regulatory and political changes. Foreign real estate investments in those countries are more susceptible to the imposition of adverse or confiscatory taxes on foreign properties, currency transfer restrictions, expropriation and difficulty in enforcing obligations.

Concentration Risk. Concentration risk is the risk that the Fund's investments in the securities of companies in one industry will cause the Fund to be more exposed to developments affecting a single industry or market sector than a more broadly diversified fund would be.

Because the Fund invests primarily in real estate securities, the Fund may perform poorly during a downturn in that industry.

Risks of Non-Diversification. The Fund is classified as a "non-diversified" fund under the Investment Company Act of 1940. Accordingly, the Fund may invest a greater portion of its assets in the securities of a single issuer than if it were a "diversified" fund. To the extent that the Fund invests a higher percentage of its assets in the securities of a single issuer, the Fund is more subject to the risks associated with and developments affecting that issuer than a fund that invests more widely.

Who Is the Fund Designed For? The Fund is designed for investors seeking to diversify their investments by adding foreign and U.S. real estate securities to their portfolios. Investors should be willing to assume the risks of a fund that invests in real estate for potential current income and long-term capital growth. Because the Fund's income level will fluctuate, the Fund is not designed for investors needing an assured level of income. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The Fund's Past Performance. Because the Fund recently commenced operations, prior performance information for a full calendar year is not yet available. While the Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future, updated performance information, showing the variability of the Fund's returns, is available by calling the toll-free number on the back of the prospectus and on the Fund's website at: https://www.oppenheimerfunds.com/fund/investors/overview/GlobalRealEstateFund

Risk Lose Money [Text]

rr_RiskLoseMoney

The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or because of poor investment selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. These risks mean that you can lose money by investing in the Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Risks of Non-Diversification. The Fund is classified as a "non-diversified" fund under the Investment Company Act of 1940. Accordingly, the Fund may invest a greater portion of its assets in the securities of a single issuer than if it were a "diversified" fund. To the extent that the Fund invests a higher percentage of its assets in the securities of a single issuer, the Fund is more subject to the risks associated with and developments affecting that issuer than a fund that invests more widely.

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

While the Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future, updated performance information, showing the variability of the Fund's returns, is available by calling the toll-free number on the back of the prospectus and on the Fund's website at: https://www.oppenheimerfunds.com/fund/investors/overview/GlobalRealEstateFund

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

https://www.oppenheimerfunds.com/fund/investors/overview/GlobalRealEstateFund

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

updated performance information, showing the variability of the Fund's returns, is available by calling the toll-free number on the back of the prospectus and on the Fund's website at: https://www.oppenheimerfunds.com/fund/investors/overview/GlobalRealEstateFund

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) imposed on purchases (as % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.50%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[3]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.45%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 715

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,020

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

715

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

1,020

Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) imposed on purchases (as % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.25%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

none

^[3]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

2.25%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

331

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

711

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

231

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

711

Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) imposed on purchases (as % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.06%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.06%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[3]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

338

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

108

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

338

Class N

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) imposed on purchases (as % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.75%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

none

^[3]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.75%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

279

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

556

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

179

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

556

Class Y

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) imposed on purchases (as % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.25%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.15%)

^[3]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

113

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

384

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

113

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

$ 384

[1] Expenses have been restated to reflect current fees.

[2] "Other Expenses" are based on estimated amounts for the Fund's current fiscal year.

[3] After discussions with the Fund's Board, the Manager has contractually agreed to waive fees and/or reimburse the Fund for certain expenses in order to limit "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" (excluding any applicable dividend expense, taxes, interest and fees from borrowing, any subsidiary expenses, Acquired Fund Fees and Expenses, brokerage commissions, extraordinary expenses and certain other Fund expenses) to annual rates of 1.45% for Class A shares, 2.25% for Class C shares, 1.75% for Class N shares, 1.10% for Class Y shares and 1.05% for Class I shares as calculated on the daily net assets of the Fund. This fee waiver and/or expense reimbursement may not be amended or withdrawn for one year from the date of this prospectus, unless approved by the Board.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Apr. 30, 2013
Registrant Name	dei_EntityRegistrantName	Oppenheimer Global Real Estate Fund
Central Index Key	dei_EntityCentralIndexKey	0001562689
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Aug. 27, 2013
Document Effective Date	dei_DocumentEffectiveDate	Aug. 28, 2013
Prospectus Date	rr_ProspectusDate	Aug. 28, 2013