Where: Solingen, Germany

Constructed: 12th Century

Most important renovation: 1890-1920

Accessible: yes

Important fact:

Destroyed in 1648 and then ruined for over two centuries. Almost demolished in 1850. Rebuilt from 1890 to 1914, but hit by a major fire in 1914, after which it was rebuilt again around 1920.

https://en.schlossburg.de/home/

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