Old Post Office Pavilion Clock Tower - historic public observation tower

The Old Post Office Pavilion, completed in 1899, includes a prominent clock tower that has long served as a public observation point overlooking Pennsylvania Avenue and the National Mall. The Romanesque Revival building is one of the few late 19th-century federal post office structures remaining in the city, and its tower offers visitors panoramic views and exhibits about the building’s history. The tower’s survival and continued public access make it a unique architectural and civic landmark in Washington.