The Ancient Olympic pentathlon was an athletic contest. Five events were contested over one day, starting with the stadion (foot race) followed by the javelin throw, discus throw, long jump, and ending with wrestling. The Olympic Games were a series of athletic competitions among representatives of city-states and one of the Panhellenic Games of Ancient Greece. They were held in honor of Zeus, and the Greeks gave them a mythological origin. The games were held every four years, or olympiad, which became a unit of time in historical chronologies. The main events at each of the games were chariot racing, wrestling, boxing, pankration, stadion and various other foot races, and the pentathlon (wrestling, stadion, long jump, javelin throw, and discus throw). Except for the chariot race, all the events were performed nude. Black-figure pottery painting, also known as the black-figure style or black-figure ceramic is one of the styles of painting on antique Greek vases. Figures and ornaments were painted on the body of the vessel using shapes and colors reminiscent of silhouettes.