The Rococo Hall is the reason people come here, and it earns the visit. Built in 1766 for Duchess Anna Amalia, the oval room rises through three tiers of bookshelves painted in soft pastels, topped by a ceiling fresco. It is one of the most beautiful library interiors in Europe, and it is small enough to feel intimate rather than monumental. Timed tickets are essential — only a handful of visitors are admitted at a time.
Beyond the famous hall, the library holds around a million volumes, including medieval manuscripts, early printed books, and the literary estates of Goethe, Schiller, and Nietzsche. The modern extension provides exhibition space for rotating displays drawn from the collection. Even if you only see the Rococo Hall, allow thirty minutes and go early in the day.