Judas Chair at the torture museum of Freiburg, Germany
The Judas Cradle, also known as the Judas chair and The Guided Cradle, was a fictional torture device. In Italian it is the culla di Giuda; in German the Judaswiege; and in French the la veille—"the wake" or "nightwatch" (because when certain muscles are contracted, the victim could not fall asleep).
The victim would presumably be placed in the waist harness above the pyramid-shaped seat, with the point inserted into their anus or vagina, then very slowly lowered by ropes. The subject is tortured by intense pressure and stretching of the orifice, eventually succumbing to tears in muscle tissue that could turn septic and kill from infection, or simply being impaled.