Questions about Culture of ancient Rome

Short answers, pulled from the story.

What was the population of Rome in the first century AD?

The city of Rome held a population that may well have exceeded one million people, with high-end estimates suggesting 3.6 million souls and low-end figures placing it at 450,000.

When did Nicene Christianity become the official state church under Theodosius I?

In 391 under Theodosius I, Nicene Christianity became the official state church excluding all other Christian churches and Hellenistic religions including Roman religion itself.

Who wrote the Aeneid and for whom was it produced?

Virgil produced the Aeneid at the request of Maecenas telling the story of Aeneas fleeing Troy.

How many years old were slaves required to be before formal manumission could occur according to the Lex Aelia Sentia in AD 4?

Owners had to be 20 years old while slaves needed to be 30 years old before formal manumission could occur as specified by the Lex Aelia Sentia in AD 4.

Which languages flourished as distinct Romance languages after Latin evolved from Old Italic?

French Italian Portuguese Romanian Spanish flourished as distinct Romance languages growing differences over time beginning around the ninth century.