File:Plan.pilier.roman.isole.png

...Mais si la pile était isolée, si une nef était accompagnée de bas-côtés, elle prenait en plan la fig. 10 bis. A est l'arc doubleau de la grande voûte, B sont les archivoltes portant le mur. Au-dessus de ces archivoltes, ce mur se retraite en F de manière à permettre aux pilastres G de porter les formerets supérieurs. C est l'arc doubleau du collatéral; D les arêtes des voûtes de ce collatéral, et H celles des voûtes hautes...

This image comes from Dictionary of French Architecture from 11th to 16th Century (1856) by Eugène Viollet-le-Duc (1814-1879).

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