In 1025, with the death of his eldest brother Hugh Magnus, he and Henry rebelled against their father and defeated him, forcing him back to
Paris. In 1031, after the death of his father the king, Robert participated in a rebellion against his brother, in which he was supported by his mother, Constance of Arles. Peace was only achieved when Robert was given Burgundy (1032). Throughout his reign, he was little more than a
robber baron who had no control over his vassals, whose estates he often plundered, especially those of the Church. He seized the income of the
diocese of Autun and the wine of the canons of
Dijon. He burgled the
abbey of St-Germain at Auxerre. In 1048, he repudiated his wife, Helie of Semur followed by the assassination of her brother Joceran and the murdering of her father, Lord
Dalmace I of Semur, with his own hands. In that same year, the
bishop of Langres, Harduoin, refused to dedicate the church of
Sennecy so as not "to be exposed to the violence of the duke." His first son, Hugh, died in battle at a young age and his second son, Henry, also predeceased him. He was succeeded by Henry's eldest son, his grandson,
Hugh I. ==Family==