The New Student's Reference Work/Aix-la-Chapelle
Aix-la-Chapelle (āks-lă-shä-pel), German Aachen, a city of Prussia. It was founded by the Romans and contains the tomb of Charlemagne. Three treaties were signed here, the most important being that of 1748, when a congress was held between France, England, Holland, Austria, Spain, Sardinia and Modena. This treaty made Switzerland independent, the Rhine free to navigation, secured the Protestant succession in England, and the disunion of the French and Spanish crowns. The dislike of England and France for the treaty caused the "Seven Years' War," beginning in 1755. Pop. (1910) 156,044.