Also known as the Judas Chair, the Chair of Torture was a terrible device of the Middle Ages. It was used until the late 1800's in Europe.
There are many variants of the chair. They all have one thing in common: spikes cover the back, arm-rests, seat, leg-rests and foot-rests. The number of spikes in one of these chairs ranges from 500 to 1,500.
To avoid movement, the victim's wrists were tied to the chair or, in one version, two bars pushed the arms against arm-rests for the spikes to penetrate the flesh even further. In some versions, there were holes under the chair's bottom where the torturer placed coal to cause severe burns while the victim still remained conscious.
This instrument's strength lies primarily in the psychological fear caused on the victims. It was a common practice to extract a confession by forcing the victim to watch someone else be tortured with this instrument.
The time of death greatly varied ranging from a few hours to a day or more. No spike penetrated any vital organ and the wound was closed by the spike itself which delayed blood loss greatly.