Skull tattoos have been popular for a number of decades. One of the most popular skull designs in the world is the “Jolly Roger” skull and crossbones that was used by piratemen in the 17th and 18th centuries. Symbolizing the presence of pirates, the skull and crossbones was used to ward off trespassers and promise death if they did not turn back. Today, it is still a well known and widely recognized tattoo design.