Vestry

[Sarah]

A parochial assembly; an assembly of persons who manageparochial affairs; -- so called because usually held in a vestry.

[Justin Bieber]

A room or building attached to a church, used as an office and for changing into ceremonial vestments.

[Tina]

a room in a church, especially one in which priests and the group of people who sing in church put on the special clothes they wear for church ceremonies, and in which things used in church ceremonies are sometimes kept