A church can have one single nave or a central nave with two or more bas-côtés (aisles, they are also part of the nave).
The axis of the nave coincides with the east-west axis of the church.
In plan the nave is indicated in pink.
The picture shows the nave and the two aisles of the Saint-Martin in Chapaize.
See also vaisseau (synonym).
|Nef - Wikipedia|
|Saint-Martin - Chapaize|