Catholicgauze notes that 745 years, today, the Roman Empire was crushed by the Empire of the Romans. On that date Byzantine Emperor Michael VII defeated Latin Emperor Baldwin II, restoring Constantinople to Greek rule. Nowadays the Turks are in charge.
Catholicgauze also explains how that the end of the this civilizational wars between the Roman Emperors led to the fall of the Greek Empire
In a twist of irony Michael VII’s rise to emperor restarted the fall of the empire. He withdrew troops from Asia Minor to fight wars of reunification in Greece and against the Bulgarians. The lack of troops on his east flank allowed the Arabs to conquer more territory. Michael also refused to reform the government and bureaucracy of the empire which the term â€œbyzantineâ€ (number 4) comes from.
Wikipedia shows that the Latin Empire, at least in legal fiction, also survived its catastrophic defeat. The title of Empire of Rome was used until Emperor James, who willed the title to the Duke of Anjou — who never cared enough to use the title himself. Thus the Latin Empire fades into history.