The town is also home to the birthplace of America's father of public education, Horace Mann. The town is also home to what may have been the nation's oldest continuously operational one-room school house (Croydon, New Hampshire's school dates to 1780, but there is debate as to whether it is truly "one room"). The Red Brick School was started in 1792, its building constructed in 1833, and was operational until 2008. St. Mary's Catholic Church, located in central Franklin and built by Matthew Sullivan, is the largest Catholic parish in the Boston Archdiocese with some 15,000 members.