Where: Loket, Czech Republic

Start of construction: 12th Century

End of construction: 16th Century

Most important renovation: 19th Century

Accessible: yes, interior only with guide

Important fact:

in use until the 17th century. Then storage room and prison (1788-1948). It has been open as a museum since 1989. German name: Burg Elbogen (elbow)

https://www.hradloket.cz/en/