Thurnau Castle (Schloss Thurnau) is a sprawling complex of buildings from the 13th to the 18th centuries, making it one of the largest castle ensembles in Upper Franconia. Its scale reflects centuries of expansion by successive noble families — the castle grew over time rather than being built to a single plan, which gives it a rambling, organic character quite different from the more formal Baroque palaces of the region.
Since 1975 the castle has housed research institutes of the University of Bayreuth, particularly focused on ceramics and materials science — a natural fit given Thurnau's pottery tradition. Parts of the complex are open to visitors, including the courtyard and some of the historic rooms. The views over the surrounding Franconian countryside from the higher parts of the complex are particularly good. Check local listings for guided tours, which run regularly in summer.