"Investigation of ancient stone huts found on Delos indicate that it has been inhabited since the 3rd millennium BC. Thucydides identifies the original inhabitants as piratical Carians who were eventually expelled by King Minos of Crete. By the time of the Odyssey the island was already famous as the birthplace of the twin gods Apollo and Artemis. (Although there seems to be some confusion of Artemis' birthplace being either Delos or the island of Ortygia.) Indeed between 900 BC and AD 100, sacred Delos was a major cult centre, where Dionysus is also in evidence as well as the Titaness Leto, mother of the above mentioned twin deities. Eventually acquiring panhellenic religious significance, Delos was initially a religious pilgrimage for the Ionians." (Wikipedia)