Will County Historic Preservation-Beecher Mausoleum Beecher Mausoleum Main menu Beecher Mausoleum is a Will County Historic Preservation Site Listed on the National Register of Historic Places September 18 2013 The Beecher Mausoleum A Washington Township Mausoleum Listed on the United States Dept. of the Interior National Park Service National Register of Historic Places Sept. 18 2013 The National Register of Historic Places is the official list of the Nations historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966 the National Park Services National Register of Historic Places is part of the national program to coordinate and support public and private efforts to identify evaluate and protect Americas historic and archeological resources.