Broadway Auditorium is a former multipurpose arena in Buffalo, New York. It was part of a complex that first opened as Broadway Arsenal in 1858 to accommodate the 65th and 74th Regiments of the New York National Guard. The facility was expanded in 1884 with the addition of a drill hall and administration building to become the Sixty-Fifth Regiment Armory. The armory was decommissioned in 1907, and the City of Buffalo opened the vacant drill hall as Broadway Auditorium in 1913.