The Scharfe Turm in Rhens is also called Hexenturm. It was built in 1396 and is located directly on the Rhine. It has a total of four floors, including the tower platform. It is the most prominent part of the city wall. Once it served as a scout and customs tower, later it was a prison (1629-1648). In 1645/46, ten "witches and warlocks" were beheaded in it after torturous imprisonment by the executioner. (regionalgeschichte.net)

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