the Crossing
This is called the 'transept' and its purpose is to provide separation between the Sanctuary and the Nave. Sometimes the transept will include an area for the choir (although a loft is more common) and/or statuary, or side altars.
If you mean the side arms of a church, it is called "the transept". Each of the two may contain a chapel.
Sunday Express: transept
Transept The ground plan of many churches forms the shape of a cross. The two 'arms' of the cross are the transepts.
The parts inside a church are: aisle, almonry, ambulatory, chancel, chapel, chantry chapel, Lady chapel, chapterhouse, choir, cloister, crossing, crypt, presbytery, sacristy, vestry, sanctuary, nave, slype, and transept. hope this helps !
If there is only one room, then it is just called "the chapel", if it is divided, the sanctuary is where the altar is, and the nave would be outside the sanctuary where there would be pews, etc. If there is an anteroom, it is called a narthex.
The Nave is the middle part of the Church. This is where the congregation sits during the service, and is flanked by aisles on each side.
Nave
Nave
It isn't called anything. It is just called part of the nave.
It is called the cruciform. It is the combined shapes of the nave and transepts.
spaceship = nave espacial space ship = barco espacial