Delphi is an archaeological site located in Greece that was an important oracle sanctuary in classical antiquity. It is now a UNESCO World Heritage Site. The site has been inhabited since at least the Mycenaean period and contains many preserved ruins from its most active period in the 6th century BC including temples, treasuries, and theaters built by various city-states to honor the oracle. The oracle and sanctuary were dedicated to the god Apollo and the site was of great religious and political importance in the ancient Greek world.