The Byzantine aquaducts which start in the east of the Gate of Persecution of the St John’s Church and which are intact within the town and particularly in the vicinity of the train station continue along the Şirince gorge and go northward. They conveyed the drinking water which was supplied from the springs in the east of the Pranga district between Belevi and Selçuk to the Byzantine period settlement on the Ayasuluk hill and the St John’s Church, which was a pilgrimage centre in the Medieval times. Marble blocks recovered from Ephesus and the Artemision were rectified and used in the pillars of the aquaducts which could remain intact up to 15 meters in the vicinity of the train station. Among them, the Ionic capitals dated back to the Archaic period are important (Selçuk Ephesus Museum, Great Courtyard). Brick was used in the arches above. A water tank or cistern of large dimensions has been recently unearthed and restored in the place where the aquaducts reach the Ayasuluk hill (to the east of the Gate of Persecution). Fluted columns and capitals of Composite order dated back to the 2nd century AD which were brought from Ephesus were used in the water cistern with an arched and vaulted structure.