Melk Abbey built
1089 CE.
Shown on the map at 48.228°, 15.331°.
Melk Abbey (German: Stift Melk) is a Benedictine abbey above the town of Melk, Lower Austria, on a rocky outcrop overlooking the Danube river, adjoining the Wachau valley, that belongs to the Austrian Congregation. The abbey contains the tomb of Saint Coloman of Stockerau and the remains of several members of the House of Babenberg, Austria's first ruling dynasty.
Text from the Wikipedia article Melk Abbey, licensed CC BY-SA 4.0.