The Naval Reserve Armory in the South Lake Union neighborhood of Seattle, Washington "is a massive concrete building exhibiting restrained Moderne and Art Deco features". It was built by the Works Progress Administration in 1941-1942, and "served as an Advanced Naval Training School" during World War II. The main interior feature is a 133 x 100-foot (30 m) drill hall which was used in Naval Reserve training of thousands of young recruits for service in the war.