Delphi, center of the cult of Apollo located on the slopes of Mount Parnassus, was one of the most revered sanctuaries of ancient Greece. Thanks to its famous oracle and the ambiguous prophecies of the Pythia, Delphi had great religious and political importance for the ancient Greeks, who considered it the "navel of the earth", and for the ancient world as a whole. Delphi hosted the panhellenic Pythian Games, whose prestige was only surpassed by that of the Olympic Games. The spirituality of the site was amplified by the exhortations of the ancient Greek sages ("Know thyself", "Nothing in excess"), inscribed on the temple at the entrance of Apollo.
The splendor of Delphi was revived in modern times with the Delphi festivals of 1927 and 1930 organized by the poet Angelos Sikelianos and the current activities of the European Cultural Center of Delphi.