to his posthumous brother, Casimir II the Just, who until that time, he remained without lands. These last will was done only partially. The destiny of the Duchy of Sandomierz could be shown in a document dated 31 December 1167: In the year 1166 in Poland during the reign of Princes Boleslaus, Mieszko and Casimir, their fourth brother, Prince Henry died without offspring. His district has been divided into three parts; the seat of his sovereignty, Sandomierz, was granted to Boleslaus, the older brother. The same day and year, Mateusz, Bishop of Kraków, also died. The other two parts were taken by the other surviving brothers: Wiślica, was given to Kazimiez II, and the rest to Mieszko III the Old. His remains were probably buried in a crypt of a church in Wiślica, where his grave is marked by an ornamental tombstone donated by his younger brother Kazimierz II. Only in 1173, after the death of Bolesław, Kazimierz finally could take the title of Duke of Sandomierz. References Balzer, O. Genealogia Piastów, Kraków, 1895. Gładysz, M. Zapomniani krzyżowcy, Warszawa, 2006. Guttner, D. "Henryk of Sandomierz." [in:] The Crusades: An Encyclopedia, Santa Barbara, 2006. Jasiński, K. Rodowód pierwszych Piastów, Warszawa, 1992. Mitkowski, J. "Henryk książę sandomierski." [in:] Polski Słownik Biograficzny, vol. 9, Wrocław, 1960-1961. D. von Güttner-Sporzyński, Poland, Holy War, and the Piast Monarchy, 1100-1230, Brepols, Turnhout, 2014. External links Receint Issues in Polish Historiography of the Crusades The archetypal crusader: Henry of Sandomierz, the second youngest son of Bolesław III of Poland 12th-century births 1166 deaths Dukes of Sandomierz Polish Roman Catholics 12th-century Roman Catholics Polish military personnel killed in action Christians of the Prussian Crusade 12th-century Polish people Monarchs killed in action