# First Council of Nicaea (325)

URL: https://christianity-history.com/timeline/325-first-council-of-nicaea
Location: Nicaea, Bithynia
Themes: Council

Constantine convenes the first ecumenical council, which condemns Arianism, adopts the Nicene Creed and regulates the date of Easter. At this point in the timeline (325), the Bishop of Rome was Pope Sylvester I (31 January 314 – 31 December 335).

## Why it matters
Its creed remains the shared confession of Catholic, Orthodox and most Protestant churches.

Pope at the time: [Pope Sylvester I](https://christianity-history.com/popes/pope-sylvester-i)

## Sources
- [Wikipedia — First Council of Nicaea](https://en.wikipedia.org/wiki/First_Council_of_Nicaea)
- [Encyclopaedia Britannica topic lookup — First Council of Nicaea](https://www.britannica.com/search?query=First+Council+of+Nicaea)
- [Wikipedia — Age Of Councils (period overview)](https://en.wikipedia.org/wiki/First_seven_ecumenical_councils)