In choir dress—that is, when he wears a cassock, rochet and mozzetta—the pectoral cross is usually suspended by a cord of silk. This cord is green and gold for an archbishop or a bishop, and red and gold for a cardinal and gold for the pope. An abbot makes use of a black and gold silk cord while an abbess and canon would use a black silk cord. Formerly, protonotaries apostolic wore a pectoral cross on a purple silk cord when celebrating in pontificals.