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Constantine the Great. The new capital city Byzantium was renamed Constantinople after him.
Byzantium was originally byzantium. It was renamed Constantinople when Roman Emperor Constantine left the city of Rome and declared Byzantium its new capital. Constantinople became the modern-day city of Istanbul when it was captured by a Turkish group of barbarians by name of the Ottomans.
Constantine the Great redeveloped the city of Byzantium, turned it into the capital of the eastern part of the Roman empire (moving it from the nearby Nicomedia in northwestern Turkey) and renamed it Constantinople (city of Constantine) in 330. Nowadays Constantinople is the Turkish city of Istanbul.
To transform the ancient Greek colony of Byzantium into a new residence
Emperor Constantine the Great moved the capital of the Byzantine/Roman Empire from Rome to Constantinople around 330 AD. He felt that Rome was an unsatisfactory capital. Rome was too far from the frontiers. Constantinople provided easy trade and military access to the Mediterranean, Black Sea, Danube River, Dnieper River, and the land route to Turkestan and India.
Byzantium was redeveloped by Constantine the Great who designated it as imperial capital and renamed it Constantinople after himself (it means City of Constantine). It was inaugurated in 330. After the Ottoman Turks took Constantinople in 1453, under the sultans, it was called Kostantiniyye and Islambol or Islambul. This turned into Istanbul when Turkey adapted the Latin alphabet in 1928. In that year, the new republican government also made it the city sole name.
Constantine the Great consecrated Nova Roma, later named Konstantinoupolis, as the new capital of the Roman Empire on the site of Byzantium after 6 years of building, in 330 CE.
Constantine moved the capital of the Roman Empire to Byzantium (now Istanbul) in AD 330. The city was at first called New Rome, later Constantinople.
Byzantium was an ancient Greek city which under Roman rule become Romanised. The emperor Constantine the Great designated it as the imperial capital. He had it redeveloped and he renamed it after himself: Constantinople, which means City of Constantine. This new name was already in use during his lifetime. After Constantine, Constantinople became the imperial capital of the eastern part of the Roman Empire. After his death Milan, which had been designated as the imperial capital of the western part of the empire by his predecessor (Diocletian), resumed its role as the capital of the western part. Constantinople was conquered by the Ottoman Turks in 1453. The use of the name Constantinople continued. However, the Turks also called it Istanbul. With the establishment of the Turkish Republic in 1922, Istanbul became the sole name of this city.
Constantine the Great ruled the Roman Empire. In his days the empire had an imperial capital in the west, Milan, and an imperial capital in the east, Nicomedia (in northwestern Turkey. Constantine moved the capital of the east from Nicomedia to Constantinople.
This is a matter of discussion among some historians. Some say that Constantine called it New Rome, but people called it Constantinople in his honour and the name stuck. Others argue that he called it Constantinople and New Rome was one of the honorific tiles given to the city, such as the Eastern Rome, the Second Rome, Alma Mater, etc.
When the Emperor Constantine the Great moved the capital of the Roman Empire, from Rome to the Ancient Greek city of Byzantium, in 330 AD, he renamed it Constantinople (city of Constantine) and made it the new capital of the Roman Empire. Because there could not be two capital cities with the same name, he called Constantinople the New Rome (Nova Roma).