1054 in History
March 12 Pope Leo IX escapes captivity and returns to Rome
July 4 Brightest known super-nova (Crab Nebula) starts shining (23 days)
July 5 Brightest supernova (Crab Nebula) 1st reported
July 16 Michael Caerularius excommunicated of Constantinople
July 17 Emperor Henry III crowns his son Henry IV king