sentences:  The first building on this site was a Roman bath, followed by a sixth-century (the dating was based on precise coin finds in stratigraphic excavation) hall church with an apse laying up against the Aqueduct of Valens.Later – possibly in the seventh century – a much larger church was built to the south of the first church.A third church, which reused the sanctuary and the apse (later destroyed by the Ottomans) of the second one, can be dated to the end of the twelfth century, during the late Comnenian period.