Beatrice of Provence (c. 1229 – 23 September 1267), was the ruling Countess of Provence and Forcalquier from 1245 until her death, as well as Countess of Anjou and Maine and Queen of Sicily by marriage to Charles I of Naples.
Beatrice was the fourth and youngest daughter of Ramon Berenguer V, Count of Provence and Beatrice, daughter of Count Thomas I of Savoy and Margaret of Geneva.
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 II, also known as Charles the Lame (French: Charles le Boiteux; Italian: Carlo lo Zoppo; 1254 – 5 May 1309), was King of Naples, Count of Provence and Forcalquier (1285–1309), Prince of Achaea (1285–1289), and Count of Anjou and Maine (1285–1290); he also was King of Albania (1285–1294), and claimed the Kingdom of Jerusalem from 1285. He was the son of Charles I of Anjou—one of the most powerful European monarchs in the second half of the 13th century—and Beatrice of Provence. His father granted Charles the Principality of Salerno in the Kingdom of Sicily (or Regno) in 1272 and made him regent in Provence and Forcalquier in 1279.
After the uprising known as the Sicilian Vespers against Charles's father, the island of Sicily became an independent kingdom under the rule of Peter III of Aragon in 1282. A year later, his father made Charles regent in the mainland territories of the Regno (or the Kingdom of Naples). Charles held a general assembly where unpopular taxes were abolished and the liberties of the noblemen and clerics were confirmed. He could not prevent the Aragonese from occupying Calabria and the islands in the Gulf of Naples. The Sicilian admiral Roger of Lauria captured him in a naval battle near Naples in 1284. As he was still in prison when his father died on 7 January 1285, his realms were ruled by regents. The remainder of his rule was spent seeking a resolution to the Sicilian war, diplomatic moves concerning his inheritance, and administrating the new Kingdom of Naples.