Sumela Monastery (Greek: Μονή Παναγίας Σουμελά, Moní Panagías Soumelá; Turkish: Sümela Manastırı) is a Greek Orthodox monastery dedicated to the Virgin Mary located at Karadağ (Greek: Sou Melá, meaning "Black Mountain") within the Pontic Mountains, in the Maçka district of Trabzon Province in modern Turkey.
During its long history, the monastery fell into ruin several times and was restored by various emperors. During the 6th century, it was restored and enlarged by the Byzantine general Belisarius at the behest of emperor Justinian.