Complex sentence: Bolesław survive his son only nine months, and died on 7 or 8 December 1201 in his castle of Leśnica and was buried in the Lubiąż Cistercian monastery founded by him.
Split into simpler sentences: Bolesław survive his son only nine months, and died on 7 or 8 December 1201 in his castle of Leśnica. He was buried in the Lubiąż Cistercian monastery founded by him.