# First Council of Constantinople (381)

URL: https://christianity-history.com/timeline/381-first-council-of-constantinople
Location: Constantinople
Themes: Council

The second ecumenical council affirms the divinity of the Holy Spirit and expands the Nicene Creed. At this point in the timeline (381), the Bishop of Rome was Pope Damasus I (1 October 366 – 11 December 384).

## Why it matters
First Council of Constantinople mattered because its decisions defined doctrine, discipline or church order for generations of Christians.

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

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