Founded in 1682 by William Penn, the City of Philadelphia contains unparalleled resources that span over three centuries of the cultural, social, political, economic and architectural history of the City, the Commonwealth and the Nation. By an ordinance passed in 1955, the Mayor and City Council created the Historical Commission to preserve this heritage. The Commission bears the responsibility for the designation as historic of buildings, structures, sites, objects and districts of historical and architectural significance in Philadelphia. The Commission regulates the appearance of these cultural resources through its role in the City's building permit process. It also offers technical assistance and guidance to the public with all services free of charge.