The William J. Clinton Presidential Center and Park is the presidential library of Bill Clinton, the 42nd President of the United States. It is located in Little Rock, Arkansas and includes the Clinton Presidential Library, the offices of the Clinton Foundation, and the University of Arkansas Clinton School of Public Service. It is the thirteenth presidential library to have been completed in the United States, the eleventh to be operated by the National Archives and Records Administration, and the third to comply with the Presidential Records Act of 1978. It is situated on 17 acres of land located next to the Arkansas River and Interstate 30 and was designed by architectural firm Polshek Partnership, LLP with exhibition design by Ralph Appelbaum Associates. The main building cantilevers over the Arkansas River, echoing Clinton’s campaign promise of “building a bridge to the 21st century”. With a 68,698-square-foot floor plan, the library itself is the largest presidential library in terms of physical area, although the Ronald Reagan Presidential Library has the greatest space overall, due to its addition of the 90,000 square feet Air Force One Pavilion in 2005.