It is in Yenihisar district center. Didyma is not actually an ancient city, it is a holy place. Didyma, which is connected to the holy road from Miletus, is a center of prophecy. The first written source about Didyma is Herodotus. B.C. In the 600s, King of Egypt II. He reports that Nekho and Lydian King Kroisos made an offering to the temple of Apollo in Didyma. The holy place of Apollo, which was very famous in the Archaic period, was built by the Persians in BC. It was burned in 494 BC. In 311 the revival begins and the temple is rebuilt. During the Seleucid period, changes were made in the temple plan and its dimensions were enlarged. From the inscriptions unearthed around the temple, it is understood that the structure, which includes the temples of Artemis, Zeus, Aphrodite and some other buildings, continued during the Roman period. M.S. Before 250 BC, the importance of the temple and A.D. By the order of Theodosios in 385, it completely lost its importance. With the spread of Christianity, a church was built on the adyton of the temple, which was not yet finished.