# St. Cyril's Monastery founded (1140)

URL: https://allhistories.com/ukraine/timeline/1140-st-cyril-s-monastery-founded
Location: Kyiv

St. Cyril's Monastery founded (Kyiv). Within the broader Kyivan Rus' period: Kyiv became the capital of Rus', a large medieval state that adopted Byzantine Christianity in 988 and flourished under Volodymyr and Yaroslav before fragmenting and falling to the Mongols. At this point in the timeline (1140), the principal ruler or leader of Ukrainian lands was Vsevolod II of Kyiv, Grand Prince of Kyiv (Kyivan Rus', 1139 – 1146). This event mattered because it shaped the religious life of Ukraine, from Orthodox and Greek Catholic Christianity to Judaism and Islam. It is placed here so readers can follow it alongside the states, rulers and turning points of Ukrainian history.

## Why it matters
This event mattered because it shaped the religious life of Ukraine, from Orthodox and Greek Catholic Christianity to Judaism and Islam.

Who Was in Power: [Vsevolod II of Kyiv](https://allhistories.com/ukraine/rulers/vsevolod-ii-of-kyiv)

## Sources
- [Wikipedia — St. Cyril's Monastery (Kyiv)](https://en.wikipedia.org/wiki/St._Cyril's_Monastery_(Kyiv))
- [Wikipedia — Timeline of Kyiv](https://en.wikipedia.org/wiki/Timeline_of_Kyiv)
- [Encyclopaedia Britannica topic lookup — St. Cyril's Monastery founded](https://www.britannica.com/search?query=St.+Cyril%27s+Monastery+founded)
- [Wikipedia — Kyivan Rus' (period overview)](https://en.wikipedia.org/wiki/Kievan_Rus%27)