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.
The name for the aisle that crosses the nave is called the transept. It typically intersects the nave at a right angle, creating a cross-shaped floor plan in churches with a cruciform layout.
If you mean the side arms of a church, it is called "the transept". Each of the two may contain a chapel.
The term for the arm of a cruciform church that is at right angles to the main body is called the "transept." The transept typically extends across the nave, creating the shape of a cross, which is characteristic of cruciform architecture. It often serves as a space for additional altars or chapels.
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.
A transept altar is an altar located within the transept of a church, which is the area that intersects the main body of the church (the nave) at right angles. This design is often found in cruciform (cross-shaped) churches and allows for additional worship space and ceremonial functions. Transept altars may be used for special services or as a focal point for specific devotional practices, enhancing the liturgical experience. They can also provide a visually distinct area for the congregation, separate from the main altar.
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.
A church plan in the shape of a cross is called a "cruciform plan." This architectural design often symbolizes the Christian faith and is commonly used in the construction of churches to represent the crucifixion of Jesus Christ. The cruciform layout typically features a central nave intersected by a transept, creating the distinctive cross shape.
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.
A typical church building is usually in the shape of a cross when viewed from above, with a long central nave and shorter arms forming the transept. This design is symbolic of the Christian faith and serves as a reminder of the crucifixion of Jesus Christ.