Thomas T. Gaff House

Thomas T. Gaff House
Location1520 20th Street, NW Washington, D.C., U.S.
Built1905
ArchitectBruce Price
Jules Henri de Sibour
Architectural styleChâteauesque
Part ofDupont Circle Historic District (ID78003056)
Designated CPJuly 21, 1978

The Thomas T. Gaff House is the diplomatic residence of the Colombian ambassador to the United States, a post currently held by Ambassador Daniel García-Peña, and previously held by Luis Gilberto Murillo. The house, a contributing property to the Dupont Circle Historic District, is located at 1520 20th Street NW, Washington, D.C., across from the north entrance to the metro station in Dupont Circle and one block from Massachusetts Avenue's Embassy Row.

Its architecture was inspired by the Château Balleroy in Normandy, France, and features a hidden ballroom and a mix of 18th- and 19th-century interior designs.

The house has been home to a wealthy industrialist from Ohio, a United States senator, a member of the United States President's Cabinet, a Greek ambassador, and a former President of Colombia.