A cappello romano (literally Roman hat) or saturno (because it is reminiscent of the ringe planet Saturn) is a hat with a wide, circular brim and a rounded rim worn by Catholic clergy. It is made of either beaver fur or felt, and lined in white silk. Unlike many other articles of ecclesiastical attire, it serves no ceremonial purpose, being primarily a practical item, worn in private life. (The galero is a ceremonial wide brim hat no longer worn.) The wearing of a cappello romano is optional, but it is never worn during services. It is generally uncommon outside of Rome today, though it was quite popular in other countries with a Catholic majority population from the 17th century until around 1970.