During much of the 19th and 20th centuries, the Washington Navy Yard was the most recognizable symbol of the United States Navy in the nation’s capital. The shipyard built a number of the Navy’s first warships and repaired, refitted, and provisioned most of the frigates, sloops, and other combatants of the fledgling naval service. The masts and rigging of USS Constitution were a common site on the banks of the Anacostia River. Booming cannon became a routine sound in southeast Washington during the mid-19th century as Commander John A. Dahlgren, “father of American naval ordnance,” test-fired new guns for the fleet.