 Following its conquest by the Ottomans it underwent hard times.From a point between 1370 and 1372 until 1387, the metropolitan was empty; Speros Vryonis speculates this was due to financial difficulties.Later in the 14th century, the sees of Chalcedon and certain patriarchal possessions in Bithynia and Hellespont were bestowed on the metropolitan of Cyzicus.