The Danforth Campus is the main campus at Washington University in St. Louis. Formerly known as the Hilltop Campus, it was officially dedicated as the Danforth Campus on September 17, 2006, in honor of William H. Danforth, the 13th Chancellor of the University, the Danforth family and the Danforth Foundation. Distinguished by its collegiate gothic architecture, the 169-acre (0.68 km²) campus lies at the western boundary of Forest Park, partially in the City of St. Louis. Most of the campus (including almost all academic and administrative buildings) is in a small enclave of unincorporated St. Louis County, while all the campus area south of Forsyth Boulevard (mostly student housing) is in suburban Clayton.