| Robert I | |
|---|---|
 | |
| Duke of Normandy | |
| Reign | 1027–1035 |
| Predecessor | Richard III |
| Successor | William II |
| Born | 22 June 1000 Duchy of Normandy |
| Died | 1, 2, or 3 July 1035 (aged 35) Nicaea |
| Partner | Herleva |
| Issue | |
| House | Normandy |
| Father | Richard II, Duke of Normandy |
| Mother | Judith of Brittany |
Robert I of Normandy (22 June 1000 – July 1035), also known as Robert the Magnificent and by other names, was a Norman noble of the House of Normandy who ruled as duke of Normandy from 1027 until his death in 1035. He was the son of Duke Richard II; the brother of Duke Richard III, against whom he unsuccessfully revolted; and the father of Duke William who became the first Norman king of England after winning the Battle of Hastings in 1066. During his reign, Robert quarrelled with the church—including his uncle Robert, archbishop of Rouen—and meddled in the disorder in Flanders. He finally reconciled with his uncle and the church, restoring some property and undertaking a pilgrimage to Jerusalem, during which he died.