Counts and dukes of Anjou in the context of "Richard the Lionheart"

The Capetian House of Anjou, or House of Anjou-Sicily was a royal house and cadet branch of the Capetian dynasty. It is one of three separate royal houses referred to as Angevin, meaning "from Anjou" in France. Founded by Charles I of Anjou, the youngest son of Louis VIII of France, the Capetian king first ruled the Kingdom of Sicily during the 13th century. The War of the Sicilian Vespers later forced him out of the island of Sicily, leaving him with the southern half of the Italian Peninsula, known as the Kingdom of Naples. The house and its various branches would go on to influence much of the history of Southern and Central Europe during the Middle Ages until it became extinct in 1435.

Historically, the house ruled the Counties of Anjou, Maine, Touraine, Provence and Forcalquier; the Principalities of Achaea and Taranto; and the Kingdoms of Sicily, Naples, Hungary, Croatia, Albania and Poland.

The Angevin Empire (/ˈændʒɪvɪn/; French: Empire Plantagenêt) was the collection of territories held by the House of Plantagenet during the 12th and 13th centuries, when they ruled over an area covering roughly all of present-day England, half of France, and parts of Ireland and Wales, and claiming overlordship and some influence over the remaining parts of Wales, Scotland and Ireland. It may be described as an early example of a composite monarchy. The empire was established by Henry II of England, who succeeded his father Geoffrey as duke of Normandy and count of Anjou (from the latter of which the term Angevin is derived). Henry married Eleanor of Aquitaine in 1152, acquiring the Duchy of Aquitaine, and inherited his mother Empress Matilda's claim to the English throne, succeeding his rival Stephen in 1154. Although their title of highest rank came from the Kingdom of England, the Plantagenets held court primarily on the continent at Angers in Anjou and at Chinon in Touraine.

The influence and power of the Angevin kings of England brought them into conflict with the kings of France of the House of Capet, to whom they also owed feudal homage for their French possessions, bringing in a period of rivalry between the dynasties. Despite the extent of Angevin rule, Henry's son King John was defeated in the Anglo-French War (1213–1214) by Philip II of France following the Battle of Bouvines. John lost control of most of his continental possessions, apart from Guyenne and Gascony in southern Aquitaine. This defeat set the scene for further conflicts between England and France, leading up to the Hundred Years' War (1337–1453), in which the Plantagenets re-established dominion over much of western, central, and northern France before losing their possessions again, this time permanently.

Henry the Young King (28 February 1155 – 11 June 1183) was the eldest son of Henry II of England and Eleanor of Aquitaine to survive childhood. In 1170, he became titular King of England, Duke of Normandy, Count of Anjou and of Maine. Henry the Young King was the only English king since the Norman Conquest to be crowned during his father's reign, but he was frustrated by his father's refusal to grant him meaningful autonomous power. He died aged 28, six years before his father, during the course of a campaign in Limousin against his father and his brother Richard.