bn:01466851n
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EN
Bolesław of Oleśnica, was a Duke of Żagań, Ścinawa, etc., during 1309-1312, Duke of Oleśnica, Namysłów, Gniezno and Kalisz during 1312-1313, Duke of Gniezno during 1313-1314 and Duke of Oleśnica since 1313 until his death. Wikipedia
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