# Bolesław III Wrymouth becomes sole ruler (1107)

URL: https://poland-history.com/timeline/1107-boleslaw-iii-wrymouth-becomes-sole-ruler
Location: Poland
Categories: ruler-change

Bolesław III drove his half-brother Zbigniew into exile after years of rivalry and became the sole ruler of Poland. Within the broader Piast Monarchy period: Under Mieszko I and his successors the Piast state accepted Christianity, gained its own church province and royal crown, and fought to hold its place between the Holy Roman Empire, Bohemia and Kievan Rus'. At this point in the timeline (1107), the governing authority was Bolesław III Wrymouth (Duke of Poland). Defended Poland against the Emperor Henry V, conquered Pomerania and left a testament dividing the country among his sons. Bolesław III Wrymouth becomes sole ruler mattered because succession and legitimacy shaped alliances, institutions and the direction of state policy. 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
Bolesław III Wrymouth becomes sole ruler mattered because succession and legitimacy shaped alliances, institutions and the direction of state policy.

Ruler at the time: [Bolesław III Wrymouth](https://poland-history.com/rulers/boleslaw-iii-wrymouth)

## Sources
- [Wikipedia — Bolesław III Wrymouth](https://en.wikipedia.org/wiki/Boles%C5%82aw_III_Wrymouth)
- [Encyclopaedia Britannica topic lookup — Bolesław III Wrymouth becomes sole ruler](https://www.britannica.com/search?query=Boles%C5%82aw+III+Wrymouth+becomes+sole+ruler)
- [Wikipedia — History of Poland during the Piast dynasty (period overview)](https://en.wikipedia.org/wiki/History_of_Poland_during_the_Piast_dynasty)