One of Europe's most important universal libraries is just around the corner from where we live in Munich.
http://www.bsb-muenchen.de/en/about-us/ From the outside it is one long stretched facade with relatively small heavy wooden doors. But then inside the splendor of the romanesque revival architecture unfolds. This library was built between 1832 and 1843. During WW II 85 % of it was destroyed but it was then reconstructed and a modern south wing added.
In this addition there is now a reading room with 535 seats and open from 8 am to midnight. Best to come early to get a seat and quiet is strictly required. No food allowed except a water bottle which has to be kept on the floor. Compared to Boston College libraries, where food and talk is allowed, it is a pleasant return to previous times.