High Quality Content by WIKIPEDIA articles! The Main Navy and Munitions Buildings were constructed in 1918 along Constitution Avenue (then known as B Street) on Washington, D.C.`s National Mall (Potomac Park), to provide temporary quarters for the United States Military. Both buildings were constructed by the Navy`s Bureau of Yards and Docks, with the United States Department of War occupying the Munitions Building. To make the buildings more resistant to fire, the buildings were constructed using concrete. With solid construction, the temporary buildings remained in use long after the end of World War I.