Ubi periculum creates the conclave

1274Major

Gregory X's decree at the Second Council of Lyon orders cardinals to be locked in and their food reduced until they elect a pope. The word conclave comes from this locked room.

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 → Third Lateran Council sets the two-thirds rule → Papal election at Viterbo lasts nearly three years → Ubi periculum creates the conclave