The Augustinian monastery where Martin Luther studied theology and was ordained as a priest, one of the most significant sites in Reformation history. The complex includes the Luther cell — a small, spare room where Luther is said to have slept during his years here — as well as the monastery church, cloister, and a museum covering Luther's life and the Reformation.
What makes the Augustinerkloster unusual is that it functions simultaneously as a historical monument, a working Protestant retreat centre, and a hotel — guests can stay in simply furnished rooms in the historic building. The church, with its medieval stained glass (partially reconstructed after World War II bombing), is beautiful and still used for services. Guided tours run daily; booking is advisable in summer.