[vincebowdren]

The comparison with the previous cathedral, the Basse Œuvre - which is still there - is astonishing. In this photo, that's the tiny-looking red-tile-roofed building on the left: https://commons.wikimedia.org/wiki/File:Cath%C3%A9drale_Sain...

It really shows how building technology had advanced in just a few centuries.