Note 40 — Chapter I · NAVE AND AISLE VAULTS
Reading edition
The double-aisled abbey church of Souvigny, which has a clerestory, might be cited as an exception to this statement, but judging from the narrowness of its inner aisles (Fig. 19) it would appear as if its nave had originally been deprived of direct light, and that the present clerestory must have been introduced with or without a vault above it, either before or at the time when the outer aisles were added. If so, it would not prove an exception to the rule. The present nave vault is an addition of a late Gothic period.