Catenary Arch
Based on arch thrust line, better at weight distribution
Notre-Dame Cathedral
Paris, 1160’s
Notre-Dame
Catenary arch: more windows, more light, flying buttresses; wooden roof: known fire risk with safety measures built in such as lip of building to catch debris
Beauvais Cathedral
France, 1225
St. Denis
Paris, 1135
Ste-Chapelle
Paris, 1240’s