Body snatching is the secret removal of corpses from burial sites. A common purpose of body snatching, especially in the 19th century, was to sell the corpses for dissection or anatomy lectures in medical schools. Those who practised body snatching were often called "resurrectionists" or "resurrection-men". A related act is grave robbery, uncovering a tomb or crypt to steal artifacts or personal effects that had been buried with the deceased; however, grave robbery differs from body snatching in that grave robbing does not involve stealing the corpse itself.