Istanbul - Küçük Ayasofya

South of Atmeydani in Istanbul, near the Sea of Marmara, stands the Küçük Ayasofya Mosque, the Little Ayasofya. It was originally the church of SS Sergius and Bacchus, built in the reign of Justinian, at the same time as San Vitale in Ravenna. From the north end of Atmeydani Dian Street (Divanyolu) runs west, following the line of the old main street of the Byzantine city.