time of the Roman emperor Nero and a lot of sherds from the same period. Then the cavea had a diameter of 52 meters and could receive 3000 spectators. Later in the first half of the 2nd century AD it was enlarged to a diameter of 61 meters and 4000 spectators would have found a seat. At this present time it has not been possible to excavate the foundations of the stage building, but the architectural members of a building typical for a scene building are known since the beginning of the 20th century. After the cavea of the theatre was excavated Helga Bumke suggested that the entablature of the so-called „Tabernakel" building was part of the scene building. The inscribed dedications on the architraves reveals that the stage building was consecrated to the gods Apollo, Artemis, Leto, Zeus, the emperor Hadrian and the people of Miletus. But it is not known who dedicated this building. As emperor Hadrian visited Miletus and Didyma in 129 AD the scene building was probably complete by that time. The winners of the musical contests, organized to worship Apollo, were honoured in several inscriptions from the Roman period. These competitions took place in the newly found theatre, but it can be assumed that a Hellenistic predecessor existed. An inscription from the beginning 3rd century BC reports that Antiochos I received a seat of honuor during the choir contests at Didyma. Other Buildings The ancient inscriptions of Didyma testify that many more buildings existed there in antiquity than the mentioned ones above. During the many years of excavations hundreds of architectural fragments came to light which could be not allocated to a known building or monument. One of them is a Doric stoa from the 2nd century BC, and another one the so-called „Prophetenhaus" or chresmographeion, a smaller Doric building also from the 2nd century BC. The search of the foundations of these and other structures is difficult because the area around Apollo's temple is closely built-up. Therefore, it is almost impossible to use geophysical prospecting methods for the search. Interpreting the written sources and old maps make it possible to find places with ancient foundations. This was done by Helga Bumke in the case of the foundation of the temple of Artemis and another Hellenistic foundation southeast of the temple of Apollo in 2013. This squarish substructure measuring 11 meters by 12 meters consisted