The papal headpiece is a TIARA, which is a five-letter word. A TIARA is a type of crown that is traditionally worn by royalty or those of high social status. It is also used in some religious ceremonies, such as the coronation of a pope. The papal TIARA is a three-tiered crown that is made of gold and decorated with precious stones. It is a symbol of the pope's spiritual authority and is only worn on special occasions.