When a new Roman Catholic pope is elected, he is given a ring with a picture of Saint Peter engraved on it. It is called the Fisherman's Ring, and all papal documents must receive its seal. When the pope dies the ring is smashed, no one but the pontiff to whom it was given is allowed to wear it and a new one is fashioned for his successor. This Tradition can be traced back to Saint Peter himself.
St. Peter (32-67 AD) - The first pope