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
Paris in World War II windows and furniture intended for Carinhall, the luxurious hunting lodge he had built in the "Schorfheide" Forest, in Germany. Another Rothschild-owned painting, "The Astronomer" by Vermeer, was reserved for Hitler himself. Fifteen masterpieces filled railroad boxcars were sent to Germany with Göring's personal train. Göring visited the "Jeu de Paume" twelve more times in 1941, and five times in 1942, adding to his collection. Confiscations continued at banks, warehouses and private residences, with paintings, furniture, statues, clocks and jewelry accumulating at the "Jeu de Paume", and filling the whole ground floor. The staff at the "Jeu de Paume" cataloged 218