Circus Roncalli is a German circus founded in 1976 by Bernhard Paul and André Heller. According to Bernhard Paul, the name was inspired by a film script of his fellow Austrian Peter Hajek, "Sarah Roncalli, Tochter des Mondes" ("Sarah Roncalli, daughter of the moon", sometimes also cited as "widow of the moon"). The reminiscence to the popular Pope John XXIII (1881–1963), whose legal name was Angelo Giuseppe Roncalli, served as a key to the success.