Nabataean, Chinese, Indian, Greek, Roman, Norse, Aztec (Mexico) and Polynesian civilizations. Juggling in ancient China was an art performed by some warriors. One such warrior was Xiong Yiliao, whose juggling of nine balls in front of troops on a battlefield reportedly caused the opposing troops to flee without fighting, resulting in a complete victory. In Europe, juggling was an acceptable diversion until the decline of the Roman Empire, after which the activity fell into disgrace. Throughout the Middle Ages, most histories were written by religious clerics who frowned upon the type of performers who juggled, called gleemen, accusing them of base morals or even practicing witchcraft. Jugglers in this era would only perform in marketplaces, streets, fairs, or drinking houses. They would perform short, humorous and bawdy acts and pass a hat or bag among the audience for tips. Some kings' and noblemen’s bards, fools, or jesters would have been able to juggle or perform acrobatics, though their main skills would have been oral (poetry, music, comedy and storytelling). In 1768, Philip Astley opened the first modern circus. A few years later, he employed jugglers to perform acts along with the horse and clown acts. Since then, jugglers have been associated with circuses. In the early 19th century, troupes from Asia, such as the famous "Indian Jugglers" referred to by William Hazlitt, arrived to tour Britain, Europe and parts of America. In the 19th century, variety and music hall theatres became more popular, and jugglers were in demand to fill time between music acts, performing in front of the curtain while sets were changed. Performers started specializing in juggling, separating it from other kinds of performance such as sword swallowing and magic. The Gentleman Juggler style was established by German jugglers such as Salerno and Kara. Rubber processing developed, and jugglers started using rubber balls. Previously, juggling balls were made from balls of twine, stuffed leather bags, wooden spheres, or various metals. Solid or inflatable rubber balls meant that bounce juggling was possible. Inflated rubber balls made ball spinning easier and more readily accessible. Soon in North America, vaudeville theatres employed jugglers, often hiring European performers. 20th century In the early to mid-20th century, variety and vaudeville shows decreased in popularity due to competition from motion picture theatres, radio and television, and juggling suffered as a result. Music and comedy transferred very easily to radio, but juggling could not. In