Leszek the White (c. 1186-1227), the prince of Sandomierz, and the son of
Casimir the Just.
After his father's death, Leszek claimed the senior
province of Cracow, having as his main rival at first
Mieszko the Old,
Casimir's brother. He eventually ascended the throne
in 1202. He made efforts to capture Halich Rus, also claimed by Hungary, but
failed. He died in tragic circumstances at Gasawa in Pomerania, where
he held a meeting with Ladislaus Spindleshanks
and Henry the Bearded, when they were unexpectedly
attacked by Swietopelk, prince of Gdansk Pomerania.
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