There was no Byzantine state before the move of the capital to Constantinople (Byzantium = Constantinople), unless you mean 1261 when the city was recovered from its western conquerors. But I suspect you don't.
The transfer of 330 made the predominantly Greek-speaking east of the Roman Empire more central. The new location proved more defensible as Rome fell to invading armies in 410 and 455. While the Western Empire finally ended in 476, the Eastern held out (apart from the interlude of Latin rule from 1204) until 1453 when Constantinople finally fell to the Ottoman Turks.
in Constantinople
Constantinople fell to the Ottoman Turks and became the capital of the Ottoman Empire and the centre of trade of this empire.
Constantine moved the capital to Constantinople. Constantinople wasnot the capital of the whole empire. it was the capital of the eastern part of the empire. Constantine moved the capital of the east from Nicomedia (in northwestern Turkey) to Constantinople. The imperial capital of the western part was Milan. Rome was the nominal capital of the whole empire.
Constantine did not move Constantinople. He founded it. The designated the city of Byzantium (in Greece) as his imperial capital, redeveloped it and renamed it Constantinople after himself (it means City of Constantine).
You have already answered you question. Constantine moved the capital to Constantinople, which means City of Constantine. However, he did not move it from Rome. Rome had already ceased to be the capital under the reign of the previous emperor, Diocletian. Diocletian had designated Nicomedia (in northwestern Turkey, just 67 miles east of Constantinople) as the imperial capital of the eastern part of the empire and Milan (in northern Italy) as the imperial capital of the western part.
He founded the city of Constantinople on the site of the old Byzantium.
Yes. This was in order to move the government of Turkey away from the religious leadership based in Constantinople.
Constantine moved the capital to Byzantium which he rebuilt and renamed Constantinople after himself.
The Roman Empire never actually fell but relocated it's capital to Byzantium and converted to Christianity at around the same time because of the emperor Constantine the Great. This move is often stated to have ended the Roman Empire in 476 AD but the peoples of Byzantium and those they ruled never stopped calling themselves Romans and never called their empire the Byzantine Empire as this was a fabrication by historians to separate the pagan Roman Empire from the Christian Roman Empire and to separate the Holy Roman Empire from the Roman Empire to prevent confusion. The Roman Empire with it's capital at Byzantium / Constantinople fell in 1453 with the fall of Constantinople meaning that the Roman Empire after it moved to Constantinople lasted around 977 years.
Constantine the Great moved his capitol to the new city of Constantinople, which he named after himself. It was founded on the site of the old city of Byzantium. Constantinople is now known as Istanbul and is largest city in modern Turkey. Constantinople was the capital of the eastern part of the empire. The capital of the western part was Milan.
Byzantium, renamed Constantinople, and later became the Ottoman capital Istanbul.
Constantine I moved the capital of the eastern part of the empire from Nicomedia (in northwestern Turkey) to the nearby Byzantium which was redeveloped and renamed Constantinople. The capital of the western part of the empire was Milan.