A cathedral is a large, imposing religious building, typically associated with the Christian faith. Common features of a cathedral include a DOME, SPIRE, STEEPLE, VAULT, APSE, CRUCIFIX, AISLE, and ICON. A DOME is a curved roof structure that is often found at the center of a cathedral. A SPIRE is a tall, pointed structure that is usually found at the top of a cathedral. A STEEPLE is a tall, slender tower that is often found at the entrance of a cathedral. A VAULT is an arched ceiling or roof structure that is often found in the interior of a cathedral. An APSE is a semicircular recess that is often found at the end of a cathedral. A CRUCIFIX is a representation of Jesus Christ on the cross, which is often found in a cathedral. An AISLE is a long, narrow passage that is often found in the interior of a cathedral. An ICON is a religious image or symbol, which is often found in a cathedral.