The Cathedral of Saint Mary of the Assumption, colloquially simply known as Saint Mary's Cathedral, is a historic church on 327 Second Street, in Fall River, Massachusetts. It is the cathedral of the Roman Catholic Diocese of Fall River. The cathedral, built in 1852, was added to the National Register of Historic Places in 1983, as St. Mary's Cathedral and Rectory. It is the oldest extant church building in the city of Fall River, and was one of the city's first Catholic parishes. Like several other cathedrals around the world, as well as a French parish in the city, the cathedral is dedicated to the Blessed Virgin Mary.