Iburg Castle built
1070 CE.
Shown on the map at 52.158°, 8.042°.
The so-called Iburg Castle (German: Schloss Iburg), is a castle and former Benedictine abbey in Bad Iburg, Germany. From ca. 1100 till 1673 it was the seat of the Prince-Bishopric of Osnabrück. It is also notable as the birthplace of Sophia Charlotte of Hanover, Queen consort in Prussia.
Text from the Wikipedia article Iburg Castle, licensed CC BY-SA 4.0.