The archaeological site of Delphi is one of the most important archaeological sites in Greece with priceless monuments. Also known as ‘the navel of the world’, Delphi was for centuries a religious and spiritual center for ancient Greeks. It was considered a pan-Hellenic sanctuary and the most important oracle site of ancient times. In 1987 the archeological site of Delphi was inscribed on the World Heritage List of UNESCO. Some of the most prominent edifices are the Temple of Apollo (4th cent. B.C.), the Stadium where the Pythian Games were held (5th cent. B.C.), the Stoa of the Athenians (5th cent. B.C.), the Altar of the Chians (5th cent. B.C.), the Tholos of the sanctuary of Athena Pronaia (4th cent. B.C.) and the Theatre (4th cent. B.C.) which hosted the Music and Theatre Play competitions, as part of the Pythian Games.

(For more information please use the following link, of the archeological site's official website)