Dillingen, or Dillingen an der Donau (Dillingen on the Danube) is a town in Bavaria, Germany. It is the administrative center of the district of Dillingen. The counts of Dillingen ruled from the 10th to the 13th century, in 1258 the territory was turned over to the Prince Bishops of Augsburg. After the Reformation, the Bishops of Augsburg moved to the Catholic city of Dillingen and made it one of the centers of the Counter-Reformation. A university was established in 1549, but was closed by Napoleon in 1804. The philosophical and theological faculties still existed in the 20th century. In 1971, however, it became a part of the Bavarian Center for the Education and Training of Teachers and Personnel Management (Akademie für Lehrerfortbildung und Personalführung). One of the largest employers in the city is Bosch and Siemens, producers of household appliances.