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About Bolesław I of Masovia
Bolesław I of Masovia, was a Polish prince, a member of the Polish House of Piast, Duke of Sandomierz during 1229–1232, Duke of Dobrzyń during 1233–1247 and Duke over the whole Masovia during 1247–1248.
Everything about Bolesław I of Masovia →- Occupation
- monarch, feudatory
- Position held
- Duke of Masovia
- Born
- 1208
- Died
- 1248, 1248