Carnegie Endowment for International Peace
Historical marker location:
700 Jackson Place Northwest, Downtown Washington, District of Columbia
( Marker is at the intersection of Jackson Place Northwest and Pennsylvania Avenue Northwest, on the right when traveling north on Jackson Place Northwest.)
Marker installed: 1976
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The District was originally much larger: The District of Columbia originally included land from both Maryland and Virginia, but in 1846, the portion of the District that had been taken from Virginia was returned to the state.