Thomas Becket canonized
1173Major
Pope Alexander III canonizes Thomas Becket, the archbishop of Canterbury killed in his cathedral by Henry II's knights in 1170. His tomb became England's leading pilgrim shrine.
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Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → Habitual fire and cooking → Homo sapiens appears → Complex language → Natufian villages → Oldest known bread → Agriculture begins → Irrigation → Uruk and the first cities → Cylinder seals → Writing (cuneiform) → Babylonian mathematics → Babylonian astronomical diaries → Thales and natural philosophy → Trial and death of Socrates → Plato's Academy → Aristotle's Lyceum → Alexander's conquests → Death of Alexander and the Hellenistic kingdoms → Seleucid Empire founded → Parthian Empire founded → Sasanian Empire → Crisis of the Third Century → Diocletian's Tetrarchy → Diocletian's Great Persecution → Edict of Milan → Constantinople founded → Roman Empire permanently divides → Visigoths sack Rome → Fall of the Western Roman Empire → Clovis unites the Franks → Stephen II anoints Pepin and seeks Frankish aid → Donation of Pepin founds the Papal States → Cadaver Synod tries Pope Formosus → Roman nobles dominate the papacy (saeculum obscurum) → Synod of Sutri deposes rival popes → Papal election decree gives cardinals the vote → Gregory VII's Dictatus papae → Investiture Controversy and Canossa → Thomas Becket canonized
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