Didyma was an ancient Ionian shrine which is today known as Didim in Turkey.
It was the most renowned oracle of the Hellenic world containing a temple and an oracle of Apollo. Mythic genealogies of the Branchidae line of priests, designed to capture the origins of Didyma as a Hellenistic tradition, date to the Hellenistic period.
This temple dedicated to Apollo was the richest and biggest of the Ionian temples on Anatolian soil. It was to cover such a vast area, that its construction lasted more than 150-200 years and yet it was planned to be without ceiling. Again after the “Ionian rebellion”, it was to Alexander the Great to order its restoration. On the ruins of the VIth century BC temple, a church was built during the Byzantine period. Though the ruins one can see today, are of pre-Christian age.
The temple was famous all over the Greek world for its oracles so that it even surpassed the reputation of Delphi.The reason for which the harbor of Panamos near Didyma became very busy and was visited by lots of commanders, ordinary and respected people, is that they wanted to learn their future from the priests of the temple. The oracle ceremonies were in two steps: the Pithy would first comment the glitters on the waters of a well and then the priests would translate these into literal and impressive words.