The Colorado National Guard Armory, known commonly by locals simply as the Armory, is a landmark in Golden, Colorado. Unusual in its construction, it was at one time the largest cobblestone building in the United States. It was built in 1913 by the Colorado National Guard as an armory, quarters, mess hall and auditorium for the Guard's Company A of Engineers. When it was completed in 1914, the Company was housed in this building's second and third floors while the first-story garden level was available for rental to the public. The Armory's original uses included: Golden's Post Office (northeast first-level storefront); photo shop (northwest first-level storefront); barracks, mess hall, weapons storage and drill hall (second level); auditorium (third level); and map room (tower). In subseq