Treaty of Lunéville
Gengenbach was founded in the 13th century and was an Imperial Free City from 1360 until the Treaty of Lunéville in 1801. During the closing stages of the 1672-1678 Franco-Dutch War in July 1678, it was the site of a French victory over the Imperialists; it was badly damaged in 1689 by retreating French forces in the 1688-1697 Nine Years War.