Founding of Constantinople
Constantine moves the capital to the Bosporus for 1,000 years

On 11 May 330 Emperor Constantine dedicated a new capital on the site of Greek Byzantium on the Bosporus. Constantinople remained the capital of the Eastern Roman (Byzantine) Empire for more than a thousand years.
Wikipedia (Russian) · Wikipedia (English) · 4th century
Meanwhile around the world (±25 years)
Africa
- c. 330 Aksum adopts Christianity — same year
Asia
- c. 320 Founding of the Gupta Empire — 10 years earlier
Alive at the time
- Constantine the Great (aged 58)
- Ezana of Axum (aged 10)
- Anthony the Great (aged 79)