Basilica of St. John, was built in the 6th c., under emperor Justinian I & his wife Theodora over the supposed site of the apostle's tomb.At his crucifixion Jesus asked his beloved disciple, John, to look after his mother. John and the Virgin went to Ephesus between 42 and 48 AD and lived there. John was exiled to Patmos for 8 years by Emp. Domitian. Later he came back to Ephesus and continued writing the Apocalypse. John was martyred in the age of 100 under the rule of the Emperor Trajan. The John buried here is John the Evangelist (Apocalypse). He is commonly mixed up with John the Baptiser. John the Baptiser has never been to Asia Minor. Hagia Theologos meaning the "Holy Theologian" was the name given to the city during Byzantine period., Turkish name first for the town and later only for the hill is Ayasuluk. A small church on the Ayasuluk Hill was dedicated to him in the 2C AD. This church was replaced in the 6C by a huge basilica built by the Emperor Justinian, the impressive ruins of which are still visible. The basilica had a cruciform plan with four domes along its longitudinal axis and a pair flanking the central dome to form the arm of the cross. Under the central glass dome was the sacred grave of St. John. Pilgrims have believed that a fine dust from his grave has magical and curative powers. In the apse of the central nave, beyond the transept is the synthronon, semicircular rows of seats for the clergy. To the north transept was attached the treasury which was later converted into a chapel. The baptistery is from an earlier period and now located to the north of the nave. Mosaics used by Byzatines are smaller than Roman mosaics. Examples can be noticed in the treasury. Baptising pool is in the shape of Jordan river. Jordan meaning the fast meandring river nothing related to the country of Jordan. First baptises were practiced by John the baptiser in Jordan River.