
quote:
A person on being appointed to the cardinalate is said to have received the red hat or cardinal's biretta. Cardinals created in each consistory through that of 1967 received a broad-brimmed, tasseled hat as a symbol of their office—the galero.
Today, Cardinals no longer receive the galero (in Latin galerum rubrum), which they would wear only once while cardinal and which would be hung up in their former cathedral on their death and left to disintegrate through decay and old age, symbolising the passing of manmade glories and power.
Source Wikipedia http://en.wikipedia.org/wiki/Red_hat_(Catholic)