Pannonhalma Archabbey (church building) built
901 CE.
Shown on the map at 47.553°, 17.761°.
The Benedictine Pannonhalma Archabbey or Territorial Abbey of Saint Martin on Mount Pannonhalma (lat. Archiabbatia or Abbatia Territorialis Sancti Martini in Monte Pannoniae) is a medieval building in Pannonhalma and one of the oldest historical monuments in Hungary. Founded in 996, it is located near the town, on top of a hill (282 m). Saint Martin of Tours is believed to have been born at the foot of this hill, hence its former name, Mount of Saint Martin (Hungarian: Márton-hegy), from which the monastery occasionally took the alternative name of Márton-hegyi Apátság. It is the second largest territorial abbey in the world, after the one in Monte Cassino. Its sights include the Basilica with the Crypt (built in the 13th century), the Cloisters, the monumental Library with 400,000 volumes, the Baroque Refectory (with several examples of trompe-l'œil) and the Archabbey Collection (the second biggest in the country).
Text from the Wikipedia article Pannonhalma Archabbey, licensed CC BY-SA 4.0.