Newport is a seaside city on Aquidneck Island in Newport County, Rhode Island, United States. It is located 23 miles (37 km) south of Providence, and 61 miles (98 km) south of Boston. Known as a New England summer resort and for the famous Newport Mansions, it is the home of Salve Regina University and Naval Station Newport which houses the United States Naval War College, the Naval Undersea Warfare Center, and a major United States Navy training center. A major 18th-century port city, Newport now contains among the highest number of surviving colonial buildings of any city in the United States. The city is the county seat of Newport County (a county that no longer has any governmental functions other than court administrative and sheriff corrections boundaries). Newport was known for being the city of some of the "Summer White Houses" during the administrations of Presidents Dwight D. Eisenhower and John F. Kennedy.