The St. Peter Armory is a former National Guard Armory in St. Peter, Minnesota, United States. Built from 1912 to 1913, it is one of the oldest armories still standing in Minnesota and was the first one to be owned by the state upon its completion. It was designed in a restrained Gothic Revival style which captures a transition in Minnesota armory design from heavy, fortresslike buildings to the simpler designs of the 1920s. It was listed on the National Register of Historic Places in 1997 for having local significance in the themes of architecture, military history, and social history. It was nominated for being an excellent example of Minnesota's pre-World War I armories, as well as for its early status, transitional architecture, and role in St. Peter as a center not only of military af