Iznik Ayasofya Museum (Hagia Sophia Museum in Nicaea)

Iznik Ayasofya Museum (Hagia Sophia Museum in Nicaea) One of the most important centers both for the Ottoman Empire and Anatolia, the Iznik County houses this museum, converted from a mosque, which was formerly the church where the seventh Ecumenical Council was held.
Originally dating from the Roman period, the building was converted into a mosque in 1331, and today it serves as a museum. The frescoes and mosaics from the Byzantium period, together with the sarcophagi are worth seeing.