# Gregorian Reform begins (1049)

URL: https://christianity-history.com/timeline/1049-gregorian-reform-begins
Location: Rome
Themes: Papacy

Pope Leo IX launches a campaign against simony and clerical marriage. At this point in the timeline (1049), the Bishop of Rome was Pope Leo IX (12 February 1049 – 19 April 1054).

## Why it matters
Gregorian Reform begins mattered because it shaped the authority, policy or public role of the papacy and the Catholic Church.

Pope at the time: [Pope Leo IX](https://christianity-history.com/popes/pope-leo-ix)

## Sources
- [Wikipedia — Gregorian Reform](https://en.wikipedia.org/wiki/Gregorian_Reform)
- [Encyclopaedia Britannica topic lookup — Gregorian Reform begins](https://www.britannica.com/search?query=Gregorian+Reform+begins)
- [Wikipedia — Medieval Church (period overview)](https://en.wikipedia.org/wiki/History_of_the_Catholic_Church#Middle_Ages)