St Andrew's Cathedral is built to the "cruciform" shape traditional of Christian churches and symbolic of the faith. The body of the cathedral, or "nave", with lower aisles on either side, is crossed by the "transept", forming a "chancel" for the seating of clergy and choir at the eastern end. The sides of the "choir" are traditionally known as "cantoris", the side of the precentor, or cantor, and "decani", the side of the dean, the senior clerical appointee within the cathedral. "See Cathedral architecture and Cathedral diagram."