File:St. Charles Borromeo Catholic Parish Church, 4th Street and Decatur Street, St. Charles, MO - 53284831882.jpg

English: Initially built in 1869-1872 and rebuilt in 1915-1916, this Romanesque Revival-style church serves as the home of the St. Charles Borromeo Catholic Parish, founded in 1769 inside a log structure by French-Canadian fur trapper Louis Blanchette, and being the most recent of a series of church buildings to house the parish since 1789. The building features a rough-hewn limestone exterior with two towers of varying heights at the northern facade, with the taller tower featuring clock faces, pinnacles, and a finial with a cross, and the lower tower featuring a finial and a simpler roof. The sanctuary of the church features a tall central nave with a gabled slate roof flanked by lower aisled with shed roofs, buttresses, a semi-circular rear apse, a rose window on the north facade, three entry portals on the north facade with roman arched stained glass transoms, and roman arched stained glass windows on the eastern and western facades. The building is attached to a Modern International-style parochial school to the south, and is flanked by surface parking lots to the east and west, with a plaza sitting at the north facade of the building outside the main entrances. The building is a contributing structure in the Frenchtown Historic District, listed on the National Register of Historic Places in 1991, and remains in active use as a Roman Catholic Parish Church.