Short answers, pulled from the story.
The Greco-Roman world describes the regions directly influenced by the language, culture, government, and religion of ancient Greece and Rome. Its core territories included the Italian Peninsula, Greece, Cyprus, the Iberian Peninsula, Anatolia, Gaul, Egypt, and the Syrian region, with a wider periphery extending into modern Romania, Hungary, Sudan, Morocco, and Crimea.
Greek served as the language of intellectual culture and commerce in the Eastern Mediterranean, while Latin was the language of public administration and law in the Western Mediterranean. Most educated Romans were bilingual in both; Greek and Latin were never the native languages of the rural majority, but functioned as a shared lingua franca for urban and cosmopolitan elites.
Polybius, writing in the mid-2nd century BCE, described the Roman Republic in Book 6 of his histories as a mixed form of government combining monarchy, aristocracy, and democracy. He argued that this mixture offset the weaknesses of each system and produced a domestic stability that allowed Rome to conquer the Mediterranean.
Cicero was a Roman philosopher and statesman who wrote political works in the 1st century BCE, including De re publica, in which he connected the Roman concept of res publica to the Greek politeia. His Republican ideals put him in conflict with Julius Caesar, Cleopatra, Mark Antony, and Octavian, and his opposition to their ambitions ultimately led to his death.
The Constitutio Antoniniana was an edict issued by the emperor Caracalla in 211 CE that extended Roman citizenship to all free men in the empire. One of its stated purposes was to increase tax revenue, but it also meant that every free person within Roman territory gained full legal rights as a Roman citizen.
Constantinople, the capital of the Byzantine Empire and the Eastern Roman Empire, fell to the Ottoman Turks led by Mehmed II in 1453. The Byzantine Empire had preserved Roman and Greek traditions for centuries after the Western Roman Empire's collapse, and its fall contributed to the emergence of Greek nationalism through the Ottoman era.