Construction begins under Maurice de SullyJan 1, 1163Labels: Maurice de, le deNotre Dame officialBritannicaWikipedia
Choir and double ambulatory construction phaseJan 1, 1163Labels: Choir, AmbulatoryNotre Dame officialWikipedia
West façade construction begins (episcopate of Eudes)Jan 1, 1200Labels: West Fa, Eudes bishopNotre Dame officialNotre Dame official
Portals erected and decorated on west frontJan 1, 1208Labels: West PortalsWikipedia FRNotre Dame official
Upper façade and towers rise; cathedral expandedJan 1, 1225Labels: Towers, Upper FaNotre Dame officialNotre Dame official
North tower completed on west frontJan 1, 1240Labels: North TowerNotre Dame officialWikimedia Commons
South tower completed on west frontJan 1, 1250Labels: South TowerNotre Dame officialWikimedia Commons
North transept lengthened by Jean de ChellesJan 1, 1250Labels: Jean de, North TranseptWikipediaStructurae
South transept remodeled; south rose createdJan 1, 1260Labels: South Rose, South TranseptWikipediaStructurae
Axial/radiating chapel expansion beginsJan 1, 1296Labels: Radiating Chapels, ChevetColumbia CCNMTLWikipedia FR
Radiating chapel campaign completedJan 1, 1314Labels: Radiating Chapels, ChevetColumbia CCNMTLWikipedia FR
Choir flying buttress campaign advancedJan 1, 1318Labels: Flying Buttresses, ChoirWikipedia FRNotre Dame official
Construction regarded as complete by 1345Jan 1, 1345Labels: Notre-Dame, Completion 1345WikipediaWikipedia FRDesigningBuild