The Paget family has operated the Swan Boats on the Public Garden pond since 1877. Robert Paget, the founder of the Swan Boats, was inspired by the opera Lohengrin. In the opera, a knight saves his princess after crossing a river in a boat pulled by a swan. There are now six swan boats. The many celebrities who have ridden the Swan Boats include President Calvin Coolidge, Shirley Temple, Princess Grace of Monaco, Lucille Ball, President John Kennedy and Jackie Kennedy, and Ted Danson.