Quedlinburg is a town situated just north of the Harz mountains, in the district of Harz in the west of Saxony-Anhalt, Germany. As an influential and prosperous trading centre during the early Middle Ages, Quedlinburg became a center of influence under the Ottonian dynasty in the 10th and 11th centuries. The castle, church and old town with around 2,100 timber houses, dating from this time of influence, were added to the UNESCO World Heritage List in 1994 because of their exceptional preservation and outstanding Romanesque architecture.