Early modern period
In the early modern period, the Holy Roman Empire was a union of territories in Central Europe under a Holy Roman Emperor the first of which was Otto I. The last was Francis II, who abdicated and dissolved the Empire in 1806 during the Napoleonic Wars. Despite its name, for much of its history the Empire did not include Rome within its borders.
Constantine XI Palaiologos
Constantine XI Dragases Palaiologos, Latinized as Palaeologus (, "Kōnstantinos XI Dragasēs Palaiologos"; 8 February 1405 – 29 May 1453) was the last reigning Roman and Byzantine Emperor, ruling as a member of the Palaiologos dynasty from 1449 to his death in battle at the fall of Constantinople in 1453.