The First Unitarian Society of Madison is a Unitarian Universalist congregation founded in 1879 in Madison, Wisconsin. Its Meeting House, designed by Frank Lloyd Wright and built 1949-1951, is a National Historic Landmark distinguished by a triangular roof of hinged-arch trusses spanning 64 feet without interior supports. The congregation numbers more than 1,000 members and has shared its facility with Shaarei Shamayim, a Reconstructionist Jewish congregation, since 2008.