They were held in honour of Apollo two years after (and two years before) each Olympic Games, and between each Nemean and Isthmian Games. They were founded sometime in the 6th century BC, and, unlike the Olympic Games, also featured competitions for music and poetry. The music and poetry competitions pre-dated the athletic portion of the games, and were said to have been started by Apollo after he killed Python and set up the oracle at Delphi. Otherwise, the athletic events were the same as the Olympic Games, except that there was no four-horse chariot race.
The winners received a wreath of bay laurels from the city of Tempe in Thessaly.