From a legal point of view, the Roman Empire, founded by
Augustus in 27 BC and divided after the death of
Theodosius I in 395 into two "parts" (or rather courts, as the empire continued to be considered as one), had survived only in the eastern part which, with the deposition of the last western emperor,
Romulus Augustulus, in 476, had also obtained the imperial regalia of the western part, reuniting from a formal point of view the Roman Empire. The Roman line continued uninterrupted to rule the
Eastern Roman Empire, whose main characteristics were Roman concept of state, medieval Greek culture and language, and Orthodox Christian faith. The Byzantines themselves never ceased to refer to themselves as "Romans" (
Rhomaioi) and to their state as the "Roman Empire", the "Empire of the Romans" (in Greek Βασιλεία των Ῥωμαίων, Basileía ton Rhōmaíōn) or "Romania" (Ῥωμανία, Rhōmanía). Likewise, they were called "
Rûm" (Rome) by their eastern enemies to the point that competing neighbours even acquired its name, such as the
Sultanate of Rûm. from
Trajan, with an imperial pennant of the
Habsburgs suggesting that as Holy Roman Emperors they are the political descendants of the ancient Roman emperors
(Walters Art Museum) The designation of the Empire as "Byzantine" is a retrospective idea: it began only in 1557, a century after the
fall of Constantinople, when
German historian
Hieronymus Wolf published his work
Corpus Historiæ Byzantinæ, a collection of Byzantine sources. The term did not come in general use in the
Western world before the 19th century, when modern
Greece was born. The end of the
continuous tradition of the Roman Empire is open to debate: the final point may be viewed as coming as early as the
sack of Constantinople in 1204, or the
capture of Constantinople in 1453, or as late as the
abolition of the Ottoman sultanate in 1922 given the Ottoman sultans'
adoption of the title of Emperor of the Romans (
Kayser-i Rum) for themselves. After the fall of Constantinople,
Thomas Palaiologos, brother of the last
Eastern Roman Emperor,
Constantine XI, was elected emperor and tried to organize the remaining forces. His rule came to an end after the fall of the last major Byzantine city,
Corinth. He then moved to Italy and continued to be recognized as Eastern emperor by the Christian powers. Other Byzantine
rump states, including the
Empire of Trebizond and the
Principality of Theodoro, were soon conquered by the Ottomans as well. His son
Andreas Palaiologos continued claims on the Byzantine throne until he sold the title to
Ferdinand II of Aragon and
Isabella I of Castile before his death in 1502. However, there is no evidence that any Spanish monarch used the Byzantine imperial titles. In
Western Europe, the Roman concept of state was continued for almost a millennium by the
Holy Roman Empire whose emperors, mostly of
German tongue, viewed themselves as the legitimate successors to the ancient imperial tradition (
King of the Romans) and Rome as the capital of its Empire. The German title of "
Kaiser" is derived from the Latin name
Caesar, which is pronounced in Classical Latin. The coronation of
Charlemagne as "Roman" emperor by
Pope Leo III in the year 800 happened at a time of unprecedented sole female imperial rule in Constantinople (by
Empress Irene) which was interpreted by adversaries as tantamount to a vacancy. The imperial title in the West generated what historians have called the
problem of two emperors. The emperors of the Holy Roman Empire sought in many ways to make themselves accepted by the Byzantines as their peers: with diplomatic relations, political marriages, or threats. Sometimes, however, they did not obtain the expected results, because from Constantinople they were always called "King of the Germans", never "Emperor". The Holy Roman Empire survived Byzantium, but was eventually dissolved in 1806 owing to pressure by
Napoleon I. In
Eastern Europe, firstly the
Bulgarian, then the
Serbian, and ultimately the Russian
czars (
Czar derived from
Caesar) proclaimed being Emperors.
Muscovite Russia adopted the idea of being a
Third Rome (with Constantinople being the second). Sentiments of being the heir of the fallen Eastern Roman Empire began during the reign of
Ivan III, Grand Duke of Moscow, who had married
Sophia Paleologina, the niece of
Constantine XI (it is important to note that she was not the heiress of the Byzantine throne; rather, her brother
Andreas was). Being the most powerful
Orthodox Christian state, the Tsars were thought of in Russia as succeeding the
Eastern Roman Empire as the rightful rulers of the Orthodox Christian world. The
House of Romanov, being the rulers of the
Russian Empire, were finally ended in the
Russian Revolution of 1917. There were also competing Bulgarian and Wallachian claims for succession of the Roman Empire. In the early 20th century, the
Italian fascists under their "Duce"
Benito Mussolini dreamed of transforming Italy back into the Roman Empire again, encompassing the
Mediterranean basin. Associated with Italian fascism,
Nazi Germany and
Francoist Spain also connected their claims with Roman imperialism.
Inspiration for other empires When India was a
British colony, the
colonial officials saw themselves as inheriting the
Greco-Roman heritage, and compared their efforts in
civilising India to those of the
Romans in ancient Britain. ==Toponymy and ethnonymy==