Where: Annweiler am Trifels, Germany
Start of construction: early 11th century
Re-construction: 20th century
Accessible: yes
Important fact:
The castle was destroyed by lightning in 1602 and was subsequently a ruin and a quarry for 2.5 centuries. A reconstruction, in large parts not true to the medieval original, took place between 1935 and 1974.
Richard the Lionheart was imprisoned here
for three weeks in 1193.
https://www.burgenlandschaft-pfalz.de/de/reichsburg-trifels/