Chairs designed for the use of the priest or other celebrant presiding at a Christian mass or other service. The chairs are usually of substantial size and having arms, placed in the choir of the church. For a set of three chairs or seats on a recessed bench for the celebrant, deacon, and sub-deacon, use "sedilia." For the chairs of a presiding bishop, use "cathedrae (bishop's chairs)." For chairs specifically for a presiding Protestant preacher, use "preacher's chairs."