The Fort
Shortly after the agreement was signed, the United States Department of War, under the secretaryship of John C. Calhoun, built a chain of forts across the American West to better protect against a potential British invasion from Canada. Constructed in 1819, Fort Saint Anthony was one of these forts. Upon its completion in 1825, it was renamed Fort Snelling in honor of its first commander, U.S. Army Colonel Josiah Snelling.
The above image is a sketch of the site as it would have looked in the mid-1820s.