 | The Smithsonian Astrophysical Observatory headquarters is located in Cambridge, Massachusetts, in the early 1960s. The headquarters of SAO moved to Cambridge in 1955 under an agreement with Harvard University. The observatory was founded in 1890, and was housed in the South Yard behind the Smithsonian Institution Building until its move to Cambridge. |  |
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| Rock Creek Park in Washington, D.C., houses the National Zoological Park. Established on Sept. 27, 1890, it is one of the oldest national parks, and one of the largest forested urban U.S. parks. |  |
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| The City Post Office Building was constructed in 1914 and served as the Washington, D.C., post office through 1986. Part of the building now houses the National Postal Museum. |  |
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~Smithsonian Building ~ Arts & Industries Building ~ National Museum of Natural History ~
~ Exhibitions ~ The Mall ~ Freer Gallery of Art ~ Patent Office Building ~
~ National Museum of American History ~ Other Buildings ~
~ Chronology ~ Messages on Postcards ~
~ Exhibits on Smithsonian History ~ Institutional History Division ~
