Elizabeth Boyle O'Reilly, How France Built Her Cathedrals…
“ Bourges, Paris, Troyes, and Clermont are the only cathedrals with double aisles about choir and nave. Bourges is exceptional in that the inner aisle is twice as high as the outer—so high that it possesses its own triforium and clearstory; so high that the pier arches around the middle church rise to more than half the height of the edifice. Indeed, many an English cathedral could stand under the pier arches of Bourges. Each pillar is encircled by eight shafts—an arrangement that accentuates its loftiness. ”
