Isny im Allgäu

Isny im Allgäu is a town in south-eastern Baden-Württemberg, Germany. It is part of the district of Ravensburg, in the western, Württembergish part of the Allgäu region.
During the three centuries following its origin in 1042, it was a commercial center controlled and exploited by various competing feudal lords. In the 13th century, Isny's merchants built a fortification system to protect the town from marauders and rival feudal rulers. The town is still partially surrounded by the city walls and moat that were built during these early turbulent times.

Wikipedia