The sanctuary is considered the holiest room in a church, while the vestry is the room used to store things. Some churches have a vault or a crypt where the dead are buried.
The rooms in a church often vary depending on the size of the building. Large churches have a loft where the organ is kept, while others have a sacristy where sacred and holy objects are kept. The chancel is the area of a church where the priest sits during a ceremony, and Jewish temples sometimes have a room called a holy of holies which is the most sacred area in the temple.