The next King of the Franks was Robert II's next son, Henry I (reigned 1027–1060). Like Hugh Magnus, Henry was crowned as co-ruler with his father (1027), in the Capetian tradition, but he had little power or influence as junior king while his father still lived. Henry I was crowned after Robert's death in 1031, which is quite exceptional for a French king of the times. Henry I was one of the weakest kings of the Franks, and his reign saw the rise of some very powerful nobles such as William the Conqueror. Henry I's biggest source of concerns was his brother – Robert I of Burgundy – who was pushed by his mother to the conflict. Robert of Burgundy was made Duke of Burgundy by King Henry I and had to be satisfied with that title. From Henry I onward, the Dukes of Burgundy were relatives of the King of the Franks until the end of the Duchy proper.