This is a list of counts and dukes of Rethel. The first counts of Rethel ruled independently, before the county passed first to the Counts of Nevers, then to the Counts of Flanders, and finally to the Dukes of Burgundy. In 1405 the County became part of the Peerage of France, and in 1581 it was elevated to a duchy. In 1663 it became the Duchy of Mazarin. The county was active in the crusades. King Baldwin II of Jerusalem was the brother of Count Gervais and Countess Matilda of Rethel, while Beatrice of Rethel married Leo I, Prince of Armenia. Rethel Dynasty Manasses I Manasses II (?–1032) Manasses III (1032–1056) Hugh I (1065–1118) Gervais (1118–1124) Matilda (1124–1151) Vitre Dynasty Odo of Vitry (1124–1158), married Matilda of Rethel Ithier (1158–1171) Manasses IV (1171–1199) Hugh II (1199–1227) Hugh III (1227–1242) John (1242–1251) Walter (1251–1262) Manasses V (1262–1272) Hugh IV (1272–1285) Joan (1285–1328) Dampierre dynasty Louis I (1285–1322; married Joan; also count of Nevers) Louis II (1322–1346; also count of Flanders and Nevers; married Margaret, countess of Artois) Louis III (1346–1384; also count of Flanders, Nevers, and Artois) Margaret (1384–1402; also countess of Flanders, Nevers, Artois, and duchess of Burgundy) Burgundian dynasty Philip the Bold (1384–1402; also duke of Burgundy; married Margaret of Dampierre) Antoine (1402–1407; later duke of Brabant) Philip II (1407–1415; also count of Nevers) Charles I (1415–1464; also count of Nevers) John II (1464–1491; also count of Nevers and Eu) Charlotte (1491–1500) Albret dynasty John of Albret (1491–1500; also lord of Orval; married Charlotte of Rethel) Marie of Albret (1500–1549) Cleves dynasty Charles II (1500–1521; also count of Nevers; married Marie of Albret) Francis I (1549–1561; also duke of Nevers) Francis II (1561–1562; also duke of Nevers) James (1561–1564; also duke of Nevers) Henriette of Cleves (1564–1601; also duchess of Nevers) Gonzaga dynasty Louis IV (1566–1595; married Henriette of Cleves; first duke of Rethel) Charles III (1595–1637; also duke of Nevers, Mantua, Montferrat, and Mayenne) Charles IV (1637–1659; also duke of Nevers, Mantua and Montferrat) House of Mazarin Cardinal Jules Mazarin (1659–1661); minister of Louis XIV of France; purchased Rethel from Charles IV Hortense Mancini (1661–1699); the niece of Cardinal Mazarin, Duchess of Mazarin, Duchess of Mayenne, Duchess of Meilleraye, mistress of Charles II of England Paul-Jules de la Porte (1699–1731; also Duke of Meilleraye) Paul de la Porte (1731–1738; also Duke of Meilleraye) Louise Jeanne de Durfort (1738–1781;