| Otto IV | |
|---|---|
 Seal of Otto IV | |
| Count of Burgundy | |
| Reign | 8 March 1279 – 17 March 1303 |
| Predecessor | Adelaide |
| Successor | Joan II |
| Born | c. 1248 Ornans |
| Died | 17 March 1303 Melun |
| Spouse | Philippa of Bar Mahaut of Artois |
| Issue | Joan II, Countess of Burgundy Blanche, Queen of France Robert of Burgundy |
| House | House of Ivrea |
| Father | Hugh de Châlon |
| Mother | Adelaide, Countess Palatine of Burgundy |
Otto IV (1248, in Ornans – 17 March 1303, in Melun[1]) was the count of the Free County of Burgundy from 1279 until 1303.
Otto was the son of Hugh of Châlons and Adelaide, Countess Palatine of Burgundy.[2] Upon his father's death in 1266/7, he became Count of Châlons. In 1267, the pro-French Otto IV got in conflict with his half-uncle John I of Chalon-Arlay, who was supported by his vassals.[3] His mother, Adelaide, died on 8 March 1279, and Otto inherited her county. However, he was unable to secure real power in the county until 1295.[4] His elder daughter Joan II succeeded in the County of Burgundy, which was later given as dowry on her marriage to Philip.[5]
His wife Mahaut drew up a contract on 4 June 1312 with the famous tomb maker Jean Pepin de Huy to make a tomb.[6] The contract specifies a tomb made of stone and alabaster.[6] Otto was to be shown as an armed knight with a shield, sword and armor.[6] A lion was shown beneath his feet with two angels to support the pillow under his head.[6] The tomb no longer exists, but the designs have been preserved.
Otto married Philippa of Bar in 1271. The marriage was childless.[7]
In 1285, Otto married his second wife, Mahaut, Countess of Artois.[7] They had: