The Main Street Armory is a multi-purpose arena located at 900 East Main Street in Rochester, New York. The Armory was built in 1905 by the United States Army and used for the training and processing of soldiers. Its main arena also hosted several non-military events, including high school basketball, circuses, and auto shows prior to the mid-1950s. In 1990, the New York National Guard left the facility, leaving it vacant and allowing it to fall into disrepair. It was purchased and renovated in the mid-2000s with the intention of refurbishing the Armory's main arena to hold events once again. The building opened for this purpose on February 3, 2007.