Here’s some historical methods of torture that freak me out:
The first one is the rat torture that was used in Europe during the Renaissance. Sometimes, this torture involved hot coals underneath you while rats would eat your innards. Another variation of this was using hungry rats to eat your face.
The second picture is quartering, which was usually used for treason. A famous person that got this treatment was Guy Faux after the failed Gunpowder Plot. This torture involves hanging a person to cause asphyxiation, but not death. Afterwards, the victim is hoisted up on a ladder while an executioner slowly cuts off parts of your body and throws them into a fire. Common things that were cut off were genitals, breasts, ears, etc. After that, your limbs were cut off and sometimes the person would still be conscious during that process. A common way to cut the limbs would be having horses gallop in four different directions until the limbs pulled away from the sockets.