Authorities in the witch trials routinely stripped an accused witch of clothing and shaved all body hair so that no potential mark could be hidden. Pins were driven into scars, calluses and thickened areas of skin: the practice of "pricking a witch". Customarily, this routine was performed in front of a large crowd. Medieval inquisitors also believed that the Devil left invisible marks upon his followers. If after stripping and shaving, the accused witch was found to have no likely blemishes, pins were simply driven into her body until an insensitive area was found. The search for witches' marks had disappeared by 1700.