iron maiden of nuremberg

from The Collaborative International Dictionary of English v.0.48

iron maiden \i"ron maid"en\, n.
   An instrument of torture used in the middle ages, consisting
   of a box large enough to hold a person, often in the shape of
   a woman, and having multiple sharp spikes on the inside.
   Called also the {iron maiden of Nuremberg}.
   [PJC]