was the administrative capital of the district of Aachen. Whle the furter 19th century, the settlement areas and industial zones of Aachen and Burtscheid grew together. Also water supply of separate Burtscheid became difficult. Therefore, a treaty was negotiated regarding the merger of the cities, which came into effect on 1 April 1897 .

During World War II, the German Nazis established and operated a forced labour