Where: Nideggen, Germany

Start of construction: 12th Century

End of construction: 14th Century

Most important renovation: 20th Century

Accessible: yes

Important fact:

Destroyed by war in 1542 and 1689, then hit by earthquakes in 1755 and 1878. This meant that the castle had slowly turned into a ruin. Parts were rebuilt around 1906, but again severely damaged in WWII. 1954/55 a new partial rebuilding followed. In 1979 the keep got its current gable roof.

https://www.kreis-dueren.de/burgenmuseum/

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