Middle Ages By Josie_H 200 The Barbarian invasion of the Western Roman Empire. 476 The last Western Roman Emperor is overthrown. 793 The Vikings begin attacking Christian settlements. 800 Charlemagne is crowned as Emperor of the Holy Roman Empire. 1066 The Normans conquer England. 1099 The First Crusade captures Jerusalem from the Muslims. 1270 The last Crusade fails.