The chasuble was originally a tent-like robe which fell in loose folds below the knee (see Plate I.
Over the chasuble he wears the fanone (see Amice); and after that the pallium.
The articles Chasuble and Cope).
This was the origin of the principal liturgical vestment, the chasuble (q.v.).
In the Roman Catholic Church the amice, alb, girdle, stole, maniple, chasuble must be solemnly blessed by the bishop or his delegate, the prayers and other forms to be observed being set forth in the Pontificale (see Benediction).
Dalmatic and tunicle are never worn by priests, as priests, but both are worn by bishops under the chasuble (never under the cope) and also by those prelates, not being bishops, to whom the pope has conceded the right to wear the episcopal vestments.
The official dress of the acolyte, according to Ordo V., was a close-fitting linen garment (camisia) girt about him, a napkin hanging from the left side, a white tunic, a stole (orarium) and a chasuble (planeta) which he took off when he sang on the steps of the ambone.
The substitution of the cope for the chasuble in many of the functions for which the latter had been formerly used was primarily due to the comparative convenience of a vestment opened at the front, and so leaving the arms free.
At the Reformation the chasuble was rejected with the other vestments by the more extreme Protestants.
Hitherto the chasuble had been worn indifferently by all ministers at the eucharist, even by the acolytes; it had been worn also at processions and other non-liturgical functions; it was now exalted into the mass vestment par excellence, worn by the celebrant only, or by his immediate assistants (deacon and subdeacon) only on very special occasions.