# Gratian's Decretum (c. 1140)

URL: https://christianity-history.com/timeline/1140-gratian-s-decretum
Location: Bologna, Italy
Themes: Theology

The Decretum Gratiani systematizes canon law. At this point in the timeline (c. 1140), the Bishop of Rome was Pope Innocent II (14 February 1130 – 24 September 1143).

## Why it matters
Gratian's Decretum mattered because it shaped how Christians understand God, Christ, salvation and the church.

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

## Sources
- [Wikipedia — Decretum Gratiani](https://en.wikipedia.org/wiki/Decretum_Gratiani)
- [Encyclopaedia Britannica topic lookup — Gratian's Decretum](https://www.britannica.com/search?query=Gratian%27s+Decretum)
- [Wikipedia — Medieval Church (period overview)](https://en.wikipedia.org/wiki/History_of_the_Catholic_Church#Middle_Ages)