Aix-la-Chapelle, Treaties of historic treaties signed in 1668 and 1748. The 1668 Treaty of Aix-la-Chapelle ended the War of Devolution, between France and Spain. France fought the war to win the Spanish Netherlands (now Belgium) and Franche-Comté, an area bordering on Switzerland. By the treaty Louis XIV of France gained several cities in the Spanish Netherlands but gave up Franche-Comté, which his army had occupied.

The 1748 Treaty of Aix-la-Chapelle ended the War of the Austrian Succession. Great Britain and France took opposite sides in this war, and their hostilities extended to America (King George's War) and to India. By the peace treaty nearly all the conquests on both sides were returned, but Frederick the Great of Prussia was permitted to keep Silesia, which he had taken from Maria Theresa of Austria.