9th Regiment Armory, ca. 1921.

The colossal granite fortress of the 9th Regiment Armory was built in 1894 to the designs of architects Edward Sargent and W. E. Cable. In addition to military use, the cavernous main hall was used as an exhibition space, athletic venue, and welfare administration center.

The 19th-century redoubt was demolished in 1969, only to be replaced by a new armory for the 22nd Regiment, in 1971.