Charles I of Naples

Charles I (Italian: Carlo; early 1226/1227 – 7 January 1285), commonly called Charles of Anjou or Charles d'Anjou, was King of Sicily from 1266 to 1285. He was a member of the Capetian dynasty and the founder of the House of Anjou-Sicily. Between 1246 and 1285, he was Count of Provence and Forcalquier in the Holy Roman Empire and Count of Anjou and Maine in France. In 1272, he was proclaimed King of Albania; in 1277, he purchased a claim to the Kingdom of Jerusalem; and in 1278, he became Prince of Achaea after the previous ruler, William of Villehardouin, died without heirs.

The youngest son of Louis VIII of France and Blanche of Castile, Charles was destined for a church career until the early 1240s. He acquired Provence and Forcalquier through his marriage to Beatrice. His attempts to restore central authority brought him into conflict with his mother-in-law, Beatrice of Savoy, and the nobility. He relinquished control of Forcalquier to his mother-in-law in 1248, although she returned it to him in 1256. Charles received Anjou and Maine from his brother, Louis IX of France, in appanage. He accompanied Louis during the Seventh Crusade to Egypt. Shortly after he returned to Provence in 1250, Charles forced three wealthy autonomous cities—Marseille, Arles and Avignon—to acknowledge his suzerainty.

Charles supported Margaret II, Countess of Flanders and Hainaut, against her eldest son, John, in exchange for Hainaut in 1253. Two years later, Louis IX persuaded him to renounce the county, but instructed Margaret to pay him 160,000 marks as compensation. Charles forced the rebellious Provençal nobles and towns into submission and expanded his suzerainty over a dozen towns and lordships in the Kingdom of Arles. In 1263, after years of negotiations, he accepted the offer of the Holy See to seize the Kingdom of Sicily from the Hohenstaufens. This kingdom, including the island of Sicily and southern Italy to well north of Naples, was known as the Regno. Pope Urban IV declared a crusade against the incumbent Manfred of Sicily and assisted Charles in raising funds for the military campaign.