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Pretty and well-tended Baroque estate house of the Bismarck family (that originated in the nearby village Bismark). The family's most famous son, Prussian-German statesman Otto von Bismarck, however, never lived here. The grounds are opened every day and for free. The interior can only be visited by groups and by prior appointment. There is a small cafe and an all-year Christmas market.
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Stadtbibliothek
Located in the former Franciscan monastery's refectory. A modern annex, built from bricks too, was added in 2012.
St.-Nikolaus-Dom
Late-Gothic brick church with remarkable late-medieval glass paintings.
Dedicated to the town's most famous son, the 18th-century archeologist and art historian Johann Joachim Winckelmann. It is located in the place of Winckelmann's birth house. The permanent exhibition shows documents and items from Winckelmann's life. An "adventure museum" targets children, including an "archeologist's camp", "time travel" to the ancient Pompeii (dressing up as ancient Romans, discovering and reconstructing imitated found pieces), a 15.6-metre-high, walkable Trojan horse, weighing 45 tons, a labyrinth garden and a playground with ancient Roman and Greek games.
Museum of regional history, including cloister garden.
Rathaus
Mainly dating from the 15th century, with Gothic and Renaissance-style elements. In the interior, there is a wall with 15th-century wood carvings, the oldest secular carved work north of the Alps. In front of it stands a 5.4-m-high Roland statue dating from the 16th century and symbolising the town's privileges.
St. Marien
Gothic, double-towered brick church from the 15th century that replaced a Romanesque predecessor. Astronomical clock.