Philotheou Monastery built
901 CE.
Shown on the map at 40.226°, 24.291°.
Philotheou or Filotheou Monastery (Greek: Μονή Φιλοθέου) is an Eastern Orthodox monastery at the monastic state of Mount Athos in Greece. It stands on the north-eastern side of the peninsula.
Text from the Wikipedia article Philotheou Monastery, licensed CC BY-SA 4.0.