The modern Olympic Games are held every four years in a different major city and feature over 18,000 athletes from over 50 countries competing in 26 events. However, the Olympic Games have not always been this way. The Ancient Olympic Games started over 2,700 years ago in Olympia, Greece and only featured male athletes from Greek city-states competing in events like sprinting, boxing, wrestling, javelin, and discus over the course of one day. In contrast to the modern Games, the Ancient Olympics were a major religious festival held every four years to honor Zeus.