A chasuble-alb is a contemporary Eucharistic vestment that combines features of the chasuble and alb. Traditional Solemn Mass vestment sets include matching chasuble, dalmatic, and tunicle. This was the origin of the principal liturgical vestment, the chasuble. It is the stole, not the chasuble, that is the priestly vestment. Over the inner vestments, John Paul II was clothed in a red chasuble. The chasuble is the principal and most conspicuous Mass vestment, covering all the rest. The 1549 Prayer Book required clergy to wear the alb, cope and chasuble. Clergy were to wear the surplice (rather than cope or chasuble) for services. Clarke shows Albert of Cashel wearing a purple chasuble, crimson stole and a bishop's mitre. As celebrant he also always wore the chasuble. A circular inscription sewn in Latin identifies the coat as a bishop's chasuble. In liturgical colour they correspond to the chasuble, but are never worn with black. When celebrating Mass, a bishop, like a priest, wears the chasuble. The priest puts on his phelonion (chasuble). However, some bishops wear their pectoral cross over their chasuble, suspended by a chain.