# First Council of Lyon (1245)

URL: https://christianity-history.com/timeline/1245-first-council-of-lyon
Location: Lyon, France
Themes: Council

Pope Innocent IV declares Emperor Frederick II deposed. At this point in the timeline (1245), the Bishop of Rome was Pope Innocent IV (25 June 1243 – 7 December 1254).

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

Pope at the time: [Pope Innocent IV](https://christianity-history.com/popes/pope-innocent-iv)

## Sources
- [Wikipedia — First Council of Lyon](https://en.wikipedia.org/wiki/First_Council_of_Lyon)
- [Encyclopaedia Britannica topic lookup — First Council of Lyon](https://www.britannica.com/search?query=First+Council+of+Lyon)
- [Wikipedia — Medieval Church (period overview)](https://en.wikipedia.org/wiki/History_of_the_Catholic_Church#Middle_Ages)