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An iron pyriamid used in middle ages as punishment.
One would be stripped naked and lowered to the Judas Seat by a system of ropes. One would be forced to sit on the point of the metal pyramid for several days. This makes it impossible for the trangressor to sleep.

Also named Judas Throne and, more commonly, Judas Cradle
"I saw him steal the bread with my own two eyes!"
"To the Judas Seat!"
by Dennis90 January 01, 2007