Updated: Oct 2, 2022
The state hall was built in the 18th century as part of the Imperial Court Library. The books have been collected since the middle of the 14th century by the emperors.
The state hall is marvelous. Looking at the old books makes you feel like you are inside a chapter of Games of Thrones or Harry Potter.
There are explanation plates that tell the history of this unique library, and I found it extremely interesting.
Tip: buy your tickets online. You don't need to print them, so you can do it onsite. Also, it's much faster than waiting: