Pontifical vestments, also referred to as episcopal vestments or pontificals, are the liturgical vestments worn by bishops (and by concession some other prelates) in the Catholic, Eastern Orthodox, Oriental Orthodox, Anglican, and some Lutheran churches, in addition to the usual priestly vestments for the celebration of the mass, other sacraments, sacramentals, and canonical hours. The pontifical vestments are only worn when celebrating or presiding over liturgical functions. As such, the garments should not be confused with choir dress, which are worn when attending liturgical functions but not celebrating or presiding.[citation needed]