Roman Empire Topic 8 By Davis07 27 BCE Augustus becomes the first Roman Empire 1 BCE Jesus is born according to Christian tradition 117 The Roman Empire reaches it's largest extent 313 Emperor Constantine ends persecution of Christians in the empire 476 The Western Roman Empire collapses 527 Justinian becomes Byzantine emperor 1054 Great Schism divides Eastern Orthodox and Roman Catholic churches 1453 Constantinople falls to the Ottoman Empire; Byzantine Empire ends.