Sumela Monastery (Greek: Μονή Παναγίας Σουμελά, Moní Panagías Soumelá; Turkish: Sümela Manastırı) is a museum and former Greek Orthodox monastery in the Pontic Mountains, in the Maçka district of Trabzon province, Turkey. Dating back to ancient times, it was in use until the Greco-Turkish population exchange in 1923.
Nestled in a steep cliff at an elevation of about 1,200 metres (3,900 ft) facing the Altındere valley, it is a site of great historical and cultural significance, as well as a major tourist attraction within Altındere National Park. It was closed to the public for safety reasons in 2015, due to an increase in rock falls, but reopened in 2019.
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