On This Day

Events in History in 1054

  • Mar 12 Pope Leo IX escapes captivity & returns to Rome
  • Jul 4 Brightest known supernova SN 1054 (creates the Crab Nebula) 1st reported by Chinese astronomers
  • Jul 16 Beginning of the Great Schism between Western and Eastern churches when Roman Cardinal Humbert issues bull of excommunication against Cerularius, Patriarch of Constantinople, on the altar of the Hagia Sophia, Constantinople

Event of interestEvent of Interest

Jul 17 Holy Roman Emperor Henry III crowns his son Henry IV king

Holy Roman Emperor Henry IV
Holy Roman Emperor
Henry IV
  • Jul 20 Patriarch of Constantinople Michael Caerularius, as head of a Synod held in Constantinople excommunicates Cardinal Humbert of the Western church (Rome)