Henry III, Duke of Silesia-Glogau

Henry III (I) of Głogów (Polish: Henryk III głogowski) (1251/60 – 3 December 1309) was a Duke of Głogów (Glogau) from 1274 to his death and also Duke of parts of Greater Poland during 1306–1309.

He was one of the sons (probably the second) of Konrad I, Duke of Głogów, by his first wife Salome, daughter of Duke Władysław of Greater Poland.

Little is known about his first years of life. In 1267 Henry III participated in the canonization of his great-grandmother Hedwig of Andechs. At the time of his father's death in 1274 he and his brothers are still minors; for this, his step-mother Sophie of Landsberg (widow of his father) and the Chancellor Mikołaj took their guardianship. Shortly after, they sold the towns of Bolesławiec and Nowogrodziec nad Kwisą to the Archbishop of Magdeburg.

The first participation of Henry III in the political arena was in 1277, when together with Przemysł II of Greater Poland he took part in an armed expedition against his uncle Bolesław II the Bald. The trip was provoked by the attitude of the Duke of Legnica, who, in order to obtain territorial concessions, kidnapped the young Henry IV and imprisoned him in his castle of Legnica. Henry III and the Bohemian King Ottokar II formed a coalition of Silesian Princes to help the prisoner Duke. However, they were defeated in the Battle of Stolec on 24 April 1277. At the head of the Legnica troops came the son and heir of Bolesław II, Henry V the Fat. It was probably here that the conflicts between him and Henry V began, which later caused great suffering to the Duke of Legnica.

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