Casimir the Just (1138-1194), the youngest son of
Boleslaus the Wrymouthed,
born probably after his father's death,
which is why he was not assigned a hereditary province in the will.
He succeeded to the province of Sandomierz only after the death of his
brother, Henry. In 1177, in the wake of a revolt by the nobles, he became
senior prince in Cracow, and in 1186, he took over the principalities
of Mazovia and Kuyavia. He sought Church support and therefore at the
congress at Leczyca in 1180, he bestowed various privileges on the Polish
Church. In exchange, he was promised the Cracow province as his hereditary
principality. Following his sudden death, war broke out for the Cracow throne
and lasted eight years.
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