Washington DC Architecture

The Old Post Office Building  Washington DC

Completed in 1899 to house the U.S. Post Office Department Headquarters and Washington DC city's post office, the Old Post Office Building is the second-tallest structure in the nation's capital, after the Washington Monument. The Old Post Office Building occupies an entire city block, centered on the north side of the Federal Triangle along Pennsylvania Avenue.  The Old Post Office Building exhibits a matured version of the Romanesque Revival style, which was popularized by renowned architect H.H. Richardson in the late nineteenth century.