The Commonwealth Armory was a Massachusetts Army National Guard armory. It was built at the intersection of Harry Agganis Way and Commonwealth Avenue in Boston, Massachusetts in 1914-1915 for Troops A, B, C, and D of the First Squadron Cavalry, Battery A of the Massachusetts Field Artillery, the Field Hospital Corps, Ambulance Corps, and the Signal Corps. During its life, it was home to military units, a concert by The Who in October 1969, and anti-war demonstrations. It was demolished in 2002 and replaced by the Agganis Arena in 2004.
Coordinates: 42°21′9.18″N 71°7′4.03″W / 42.3525500°N 71.1177861°W