Christianity from 500-1500 By lanora40 Period: 500 to Dec 12, 1500 Christianity 500-1500 596 Pope Gregory I sends missionaries to convert Anglo-Saxons Dec 12, 800 Charlemagne crowned emperor of the Romans by Pope Leo Dec 12, 1215 Magna Carta Dec 12, 1429 Joan of Arc liberates Orleans Dec 12, 1517 Martin Luther writes Ninety-Nine Theses, the Reformation begins