One of the very few churches in Gironde with a trefoil chevet. The arms of the transept have apsidioles. The vault in the central part of the transept is on a pendentive and has a barlong plan. The bell tower staircase has a Saint-Gilles spiral staircase with a hollow core. The apse and the two arms of the transept are cross-vaulted. The nave is barrel-vaulted with double arches.