Zwinger (Münster)
The Zwinger in the Westphalian city of Münster is part of the old city fortifications from the Early Modern Period. In the Nazi era it was both a gaol and a Gestapo place of execution and was heavily damaged by allied air raids. Since its conversion to a memorial the Zwinger has belonged to the Münster City Museum and is home to the sculpture Das gegenläufige Konzert.