The heart of Old Town Florissant is listed on the National Register of Historic Places as the St. Ferdinand Central Historic District. The boundaries of the district are roughly rue St. Francois, rue St. Ferdinand, and rue St. Denis, and Lafayette Street. The City of St. Ferdinand Multiple Resource Area (MRA), located in the oldest section of the present city of Florissant, encompasses approximately 156 city blocks and encloses the approximate area of the City of St. Ferdinand, as Florissant was known from 1857 to 1939. This MRA comprises 124 historically significant properties ranging in date from 1790 to 1940. The historic Old St. Ferdinand Shrine is located on the western end of Old Town. The Shrine and Historic Site consists of four historic buildings on their original locations: the 1819 convent, 1821 church, 1840 rectory, and 1888 schoolhouse. It is listed individually on the National Register of Historic Places and is a U.S. Historic District.