Basilica of Saint-Denis (Nave reconstructed in c13) High, light-flooded spaces (Abbot Suger) Pointed arches drop their thrust more vertically; reach greater height than rounded arches Ribbed vaults made it easier to construct vaults (no centring needed) Clustered columns enable one column to support ribs in different directions with more free space More control over pointed arch width and height (2h 36min, apr 9, 1093 y