The oracle of Delphi was one of the most sacred places of the ancient Greek world and it was dedicated to the Greek God Apollo. From every part of the Greek world (Sparta, Athens, Macedonia, Thessaly e.t.c.) people used to come and ask for guidance by the Gods. It was here that king Philip and Alexander the Great came before marching against Persia. It was here that the Athenians came for consultation on how to save their city from Xerxes.