Transept, bras du (transept arm)

A bras du transept is one of the arms of the transept.
In plan (Wikipedia) the bras du transept are the two parts of the transept north and south of the croisée (crossing).
The picture shows a view on crossing and southern transept arm, taken from the northern transept arm of the Saint-Roch in Passy.
see also transept, croisillon du (synonym).
For all parts of the transept described above see also all other entries related to transept.

Bras du transept - Wikipedia

Saint-Roch - Passy