Great Blankenburg Castle (German: Schloss Blankenburg) was built on the limestone hill of Blankenstein (305 m above sea level (NN)) in the town of Blankenburg in the district of Harz in the German state of Saxony-Anhalt. Nearby is the Little Castle with its Baroque garden, tea house and museum, the town wall, the pheasant garden, the castle park and the castle pond.