Four of the most prominent events were collectively known as the Panhellenic Games: two of them, the Olympic Games and Nemean Games, were held in honour of Zeus, while the Pythian Games honoured Apollo, and the Isthmian Games honoured Poseidon.
Over time, the sporting calendar in Ancient Greece expanded to include numerous festivals. Four of the most prominent events were collectively known as the Panhellenic Games: two of them, the Olympic Games and Nemean Games, were held in honour of Zeus, while the Pythian Games honoured Apollo, and the Isthmian Games honoured Poseidon.