who was the roman emperor when christ was born
Tiberius Tiberius (/taɪˈbɪəriəs/; Latin: Tiberius Caesar Divi Augusti filius Augustus;[1][2] 16 November 42 BC – 16 March 37 AD) was Roman emperor from 14 AD to 37 AD, succeeding the first emperor, Augustus.
Byzantine Empire Several signal events from the 4th to 6th centuries mark the period of transition during which the Roman Empire's Greek East and Latin West divided. Constantine I (r. 324–337) reorganised the empire, made Constantinople the new capital, and legalised Christianity. Under Theodosius I (r. 379–395), Christianity became the Empire's official state religion and other religious practices were proscribed. Finally, under the reign of Heraclius (r. 610–641), the Empire's military and administration were restructured and adopted Greek for official use instead of Latin.[4] Thus, although the Roman state continued and Roman state traditions were maintained, modern historians distinguish Byzantium from ancient Rome insofar as it was centred on Constantinople, oriented towards Greek rather than Latin culture, and characterised by Orthodox Christianity.[3]