Roman emperor
The Western Roman Empire collapsed in the late 5th century. Romulus Augustulus is often considered to be the last emperor of the West after his forced abdication in 476, although Julius Nepos maintained a claim recognized by the Eastern Empire to the title until his death in 480. Following Nepos' death, the Eastern Emperor Zeno abolished the division of the position and proclaimed himself as the sole Emperor of a reunited Roman Empire. The Eastern imperial lineage continued to rule from Constantinople ("New Rome"); they continued to style themselves as Emperor of the Romans (later βασιλεύς Ῥωμαίων in Greek), but are often referred to in modern scholarship as Byzantine emperors. Constantine XI Palaiologos was the last Roman emperor in Constantinople, dying in the Fall of Constantinople to the Ottomans in 1453.
Sicilia (Roman province)
The 5th century Migration Period was a period of serious crisis for the Roman Empire. In 410, the Visigoths under Alaric sacked Rome. In 476, the general Odoacer deposed Romulus Augustulus traditionally considered the last Western Roman Emperor. The relative tranquility of Sicily in this period attracted many people. Just as in earlier periods, many senatorial families had been spurred to acquire vast estates of fertile land. High functionaries and religious officials (both Christian and pagan) travelled to Sicily to dedicate themselves to study, hunting and entertainment. We know that Nicomachus Flavianus the Younger, "praefectus urbi" between 361 and 362, had an estate near Enna, where he produced a revised edition of the first ten books of Livy in 408. Others came as refugees, such as Melania the Younger, who fled Alaric's sack of Rome and took refuge at Messina with her husband and friends in 410.