Galero

A cardinal's hat worn by St Jerome, depicted c. 1625 by Rubens

A galero (plural: galeri; from Latin: galērum, originally connoting a helmet made of skins; cf. galea) is a broad-brimmed hat with tasselated strings which was worn by clergy in the Catholic Church. Over the centuries, the red galero was restricted to use by individual cardinals while such other colors as black, green and violet were reserved to clergy of other ranks and styles.