# Ostrów Agreement (1392)

URL: https://poland-history.com/timeline/1392-ostrow-agreement
Location: Astravas

Jagiełło recognised his cousin Vytautas as ruler of Lithuania, ending their civil war. Within the broader Jagiellonian Age period: The union with Lithuania created one of Europe's largest states. Victory over the Teutonic Order, the rise of noble democracy and a brilliant Renaissance culture marked the Jagiellonian golden age. At this point in the timeline (1392), the governing authority was Jadwiga (King of Poland), together with Władysław II Jagiełło (King of Poland). Crowned 'king' in 1384; her marriage to Jogaila created the Polish–Lithuanian union. Canonised in 1997. Ostrów Agreement mattered because its terms redrew borders or alliances and constrained Poland's options for years to come. The event is placed here so readers can follow it alongside changes in government, warfare, society, religion and culture across Polish history.

## Why it matters
Ostrów Agreement mattered because its terms redrew borders or alliances and constrained Poland's options for years to come.

Ruler at the time: [Władysław II Jagiełło](https://poland-history.com/rulers/wladyslaw-ii-jagiello)

## Sources
- [Wikipedia — Ostrów Agreement](https://en.wikipedia.org/wiki/Ostr%C3%B3w_Agreement)
- [Encyclopaedia Britannica topic lookup — Ostrów Agreement](https://www.britannica.com/search?query=Ostr%C3%B3w+Agreement)
- [Wikipedia — Jagiellonian dynasty (period overview)](https://en.wikipedia.org/wiki/Jagiellonian_dynasty)