Individual #Byzantium  an ancient city on the Bosporus founded by the Greeks; site of modern Istanbul
  instance of:  city
  part of:  Byzantine_Empire__Eastern_Roman_Empire  a continuation of the Roman Empire in the East after AD 330 when Constantine the Great rebuilt Byzantium and called it Constantinople and made it his capital
     part of:  Roman_Empire  an empire including the lands in Europe and Africa and Asia that were ruled by ancient Rome
        part of:  Africa  the second largest continent; located south of Europe and bordered to the west by the South Atlantic and to the east by the India Ocean
           part of:  eastern_hemisphere__easternhemisphere__orient  the hemisphere that includes Eurasia and Africa and Australia
        part of:  Asia  the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations
           part of:  Eurasia  the land mass formed by the continents of Europe and Asia
              part of:  eastern_hemisphere__easternhemisphere__orient  the hemisphere that includes Eurasia and Africa and Australia
              part of:  northern_hemisphere  the hemisphere north of the equator
        part of:  Europe  the 2nd smallest continent (actually a vast peninsula of Eurasia); the British use `Europe' to refer to all of the continent except the British Isles
           part of:  Eurasia  the land mass formed by the continents of Europe and Asia

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