Since January 1, 1951, the Independence Hall group of buildings has been administered by the National Park Service of the United States Department of the Interior as a part of Independence National Historical Park. Under the terms of a cooperative agreement made in 1950 between the City of Philadelphia and the Department of the Interior, the National Park Service assumed the administration and maintenance of the buildings and Independence Square, with the City retaining ownership of the property. Also under National Park Service administration are the Deshler-Morris House in Germantown, as well as those properties within the park which have been acquired by the Federal Government. All inquiries concerning the area should be addressed to the Superintendent, Independence National Historical Park, Old Custom House, 420 Chestnut Street, Philadelphia 6, Pa.