Tennis recreational players and is also a popular worldwide spectator sport. The four Grand Slam tournaments (also referred to as the Majors) are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open also played on hard courts. Historians believe that the game's ancient origin lay in 12th century northern France, where a ball was struck with the palm of the hand. Louis X of France was a keen player of jeu de paume ("game of the palm"), which evolved into real tennis, and became
Hampton Court Palace with the Hampton Court astronomical clock, an early example of a pre-Copernican astronomical clock. Still functioning, the clock shows the time of day, the phases of the moon, the month, the quarter of the year, the date, the sun and star sign, and high water at London Bridge. The latter information was of great importance to those visiting this Thames-side palace from London, as the preferred method of transport at the time was by barge, and at low water London Bridge created dangerous rapids. This gatehouse is also known today as Anne Boleyn's gate, after Henry's second wife. Work was