The Byzantine Greeks (or Byzantines) were the medieval Greek and/or Hellenised citizens of the Byzantine Empire (Eastern Roman Empire), who were the main inhabitants of Constantinople and Asia Minor (modern Turkey), the Greek islands, Cyprus, and portions of the southern Balkans, and formed large minorities, or pluralities, in the coastal urban centres of the Levant and northern Egypt. Throughout the Middle Ages, the Byzantine Greeks self-identified as Rhōmaîoi (Greek: Ῥωμαῖοι pronounced [roˈmei], "Romans") and Graikoí (Γραικοί, "Greeks"), but are referred to as "Byzantines" and "Byzantine Greeks" in modern historiography. The terms "Byzantine Empire" and "Byzantine Greeks" were first coined in the English language in 1857 by British historian George Finlay.
The social structure of the Byzantine Greeks was primarily supported by a rural, agrarian base that consisted of the peasantry, and a small fraction of the poor. These peasants lived within three kinds of settlements: the chorion or village, the agridion or hamlet, and the proasteion or estate. Many civil disturbances that occurred during the time of the Byzantine Empire were attributed to political factions within the Empire rather than to this large popular base. Soldiers among the Byzantine Greeks were at first conscripted amongst the rural peasants and trained on an annual basis. As the Byzantine Empire entered the 11th century, more of the soldiers within the army were either professional men-at-arms or mercenaries.