Henry I of France whose death Henry was left to deal with his rebel sibling. In 1032, he placated his brother by giving him the duchy of Burgundy which his father had given him in 1016. In an early strategic move, Henry came to the rescue of his very young nephew-in-law, the newly appointed Duke William of Normandy (who would go on to become William the Conqueror), to suppress a revolt by William's vassals. In 1047, Henry secured the dukedom for William in their decisive victory over the vassals at the Battle of Val-ès-Dunes near Caen; however, Henry would later support the barons against
William, Duke of Opava of Opava after Bolko's death from the latter's brother Nicholas I and in 1464, he purchased the other 2/3 in Opole in 1464 from John II, thereby considerable increasing his political and economic influence in Silesia. William of Troppau died in 1452. He was buried in the Holy Spirit Church in Opava. William was married with Salome, a daughter of the East Bohemian nobleman Půta III of Častolovice and his wife, Anna, the daughter of Albert of Koldice. They had the following children: William, Duke of Opava Duke William of Opava (; – 15 August 1452) was a member of