English: Detail cropped out of an 18th century map showing the territories (in the darker green) of the three free imperial cities of Offenburg, Gengenbach and Zell am Harmersbach just east of the Rhine. The last two cities, which were contiguous, ruled over a hinterland, while tiny Offenburg had no hinterland and was entirely surrounded by the Austria-ruled Landvogtei Ortenau. The double-headed eagle next to the name of each cities symbolizes their status as free imperial cities.
Cropped out of map four of a nine-map series centered on the Circle of Swabia titled Suevia Universa by Matthäus Seutter and based on information supplied by Jacques de Michal. Published c. 1725-1727.