Hugh IV of Burgundy

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Hugh IV, also known as Hugo IV, was the Duke of Burgundy from 1218 to 1272 and titular King of Thessaloniki from 1266 until his death in 1272. He was born on March 9, 1212, in Villaines-en-Duesmois, and died on October 27, 1272.

Hugh IV was the son of Duke Odo III of Burgundy and Alix of Vergy. In 1237, he renounced his claim to the barony of Salon for the counties of Chalon and Auxonne in exchange for a significant amount of land, which expanded the Duchy of Burgundy and benefited the regional economy through increased wine trade.

Hugh IV was an opponent of the regency of the County of Champagne by Blanche of Castile. He also opposed the Regency of The County of champagne by blanche of castile. In 1239, he joined a crusade led by King Teobaldo I of Navarra and supported by Federico II.

In 1249, Hugh IV arrived in Cyprus with Louis IX of France on the Seventh Crusade. He later returned to Burgundy after his time in Cyprus. During this period, he met Baldwin II, Emperor Latin, who granted him rights to the titular kingdom of Thessalonica in exchange for supporting Balduin's reconquest.

Hugh IV married Yolande of Dreux in 1229 and had several children with her, including Margaret, Mistress of Molinot; Wilhelm III of Mont-Saint-Jean; Guido VI of Limoges; Odo Count of Nevers, Auxerre, and Tonnere; Johann Lord of Bourbon and Count of Charolais; Adelheid (Alix) married to Duke Henry III from Brabant. He also had a son Robert II with his second wife, Marie-Marguerite de Molinot.

Hugh IV's later years were marked by participation in the Seventh Crusade against Tunis in 1270.