Major Events Hagia Sophia May 7 In Constantinople, the dome of the Hagia Sophia collapses. Justinian I immediately orders the dome rebuilt. Who Died in 558 AD Dec 23 Childebert, King of France (specifically, the Neustrian Franks) (511-58), dies at about 62 557 AD History by Year 561 AD Medieval Popes Gregory I Gregory XIII Julius II Julius III Leo X Pius V