Events of the Middle Ages By Turkey boy 527 Justinian the First becomes Eastern Roman Emperor 532 Nika Riots in Constantinople 534 Justinian the First publishes the Code of Civil law 535 Gothic War begins in Italy as a result of Justinian's Reconquest 554 Gothic War in Italy ends 570 Muhammad, prophet of the Muslim God Allah, is born Sep 9, 622 Muhammad begins migration from Mecca to Medina Jun 8, 632 Muhammad dies Oct 1, 732 Battle of Tours begins May 30, 768 Beginning of Charlemagne's reign Dec 25, 800 Charlemagne is crowned Holy Roman Emporer Jan 28, 814 Charlemagne dies Aug 22, 843 Treaty of Verdun divides Charlemagne's empire Dec 24, 962 Otto the great crowned Holy Roman Emporer May 7, 1050 The astrolabe is first used in Europe Apr 3, 1095 Pope Urban issues the Crusades to capture the Holy Land Aug 28, 1096 Jerusalem is re-taken from the Muslims Nov 23, 1117 The University of Oxford is founded Dec 14, 1192 Muslims recapture Jerusalem during the Third Crusade Sep 6, 1202 The Fourth Crusade sacked Croatian town of Zadar