Old Post Office Pavilion (closed)

The Old Post Office, listed on the National Register of Historic Places as the Old Post Office and Clock Tower and located at 1100 Pennsylvania Avenue NW in Washington, D.C., was begun in 1892, completed in 1899, and is a contributing property to the Pennsylvania Avenue National Historic Site. It was used as the city's main General Post Office until 1914 at the beginning of World War I, succeeding an earlier 1839 edifice, G. P.O. of Classical Revival style, expanded in 1866 on F Street, which later was turned over to the Tariff Commission and several other agencies.