Medieval Europe By ferretboy123 380 Christianity is the main religion of the roman empire 400 Romans begin to lose control of their empire 476 End of Rome's western empire Period: 500 to 1000 The early middle ages 570 Birth of Mohammed 590 Gregory becomes pope 622 Mohammed becomes a religious leader 768 Charlemagne becomes king of the Franks 800 Charlemagne is the most powerful European ruler Period: 800 to 1000 The viking era 1054 Creation of orthodox church 1066 William the conqueror gains power in England