Catherine wheel

English: The breaking wheel, also known as the Catherine wheel, was a torturous capital punishment device used in the Middle Ages and early modern times for public execution by cudgeling to death.

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  The breaking wheel in use in Cologne in the early modern period. (The trial of Peter Stumpp)
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  The college shield of St. Catharine's College, Cambridge, depicting a breaking wheel
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  Supralibros of the Lübeck Public Library, housed in the former St. Catherine's Convent, depicting St. Catherine's wheel and sword
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