See biography by C. W. David (1920).
(born circa 1054—died February 1134, Cardiff, Wales) Duke of Normandy (1087–1106). The eldest son of William I, he was named heir to Normandy but rebelled twice (circa 1077, circa 1082). Robert was exiled to Italy but returned as duke on his father's death. He pawned Normandy to his brother William II and joined the First Crusade, in which he fought bravely and helped capture Jerusalem (1099). He led an unsuccessful invasion of England after Henry I became king (1100); Henry then invaded Normandy (1105–06) and captured Robert, who spent the rest of his life as a prisoner.
Learn more about Robert II with a free trial on Britannica.com.