Papal Tiara

Papal Tiara = Triple Crown The earliest instance of the coronation of a pope was that of Nicholas I., in the year 858, who added a gold circlet to his cap as the symbol of civil power. The second circlet was added by Boniface VIII. in the following century, as is generally thought, to denote his spiritual power over sovereigns; and the third by Urban V. in the year 1632, as a mere ornament, without any special signification. It should be added that the Pope ordinarily wears a mitre, the tiara being reserved for state occasions. At the same time, whenever he says Mass in public the tiara is always laid on the altar. http://www.sacred-texts.com/etc/mco/ml03.htm