Philip III of France in the context of "Louis IX of France"

The Capetian dynasty (/kəˈpiːʃən/ kə-PEE-shən; French: Capétiens/ka.pe.sjɛ̃/), also known as the House of France (French: La Maison de France), is a dynasty of Frankish origin, and a branch of the Robertians agnatically, and the Carolingians through female lines. It is among the largest and oldest royal houses in Europe and the world, and consists of Hugh Capet, the founder of the dynasty, and his male-line descendants, who ruled in France without interruption from 987 to 1792, and again from 1814 to 1848. The senior line from the House of Capet ruled in France from the election of Hugh Capet in 987 until the death of Charles IV in 1328. That line was succeeded by cadet branches, first the House of Valois, and succeeding them the House of Bourbon, which ruled until the French Revolution abolished the monarchy in 1792 and tried and executed King Louis XVI in 1793. The Bourbons were restored in 1814 in the aftermath of Napoleon's defeat, but had to vacate the throne again in 1830 in favor of the last Capetian monarch of France, Louis Philippe I, who belonged to the House of Orléans, a cadet branch of the Bourbons. Cadet branches of the Capetian House of Bourbon are still reigning over Spain and Luxembourg.

The dynasty had a crucial role in the formation of the French state. From a power base initially confined to their own demesne, the Île-de-France, the Capetian kings slowly but steadily increased their power and influence until it grew to cover the entirety of their realm. For a detailed narration on the growth of French royal power, see Crown lands of France. Members of the dynasty were traditionally Catholic, and the early Capetians had an alliance with the Church. The French were also the most active participants in the Crusades, culminating in a series of five Crusader kings – Louis VII, Philip Augustus, Louis VIII, Louis IX, and Philip III. The Capetian alliance with the papacy suffered a severe blow after the disaster of the Aragonese Crusade. Philip III's son and successor, Philip IV, arrested Pope Boniface VIII and brought the papacy under French control. The later Valois, starting with Francis I, ignored religious differences and allied with the Ottoman sultan to counter the growing power of the Holy Roman Empire. Henry IV was a Protestant at the time of his accession, but realized the necessity of conversion after four years of religious warfare.

The Capetian House of Valois ( VAL-wah, also US: /vælˈwɑː, vɑːlˈwɑː/ va(h)l-WAH, French: [valwa]) was a cadet branch of the Capetian dynasty. They succeeded the House of Capet (or "Direct Capetians") to the French throne, and were the royal house of France from 1328 to 1589. Junior members of the family founded cadet branches in Orléans, Anjou, Burgundy, and Alençon.

The Valois descended from Charles, Count of Valois (1270–1325), the second surviving son of King Philip III of France (reigned 1270–1285). Their title to the throne was based on a precedent in 1316 (later retroactively attributed to the Merovingian Salic law) which excluded females (Joan II of Navarre), as well as male descendants through the distaff side (Edward III of England), from the succession to the French throne.

Roger-Bernard III (1243 – 3 March 1302) was the Count of Foix from 1265 to his death. He was the son of Roger IV of Foix and Brunissende of Cardona. He entered into conflicts with both Philip III of France and Peter III of Aragon, who held him in captivity for a time. He was nevertheless a distinguished poet and troubadour.

The Aragonese Crusade (1284–1285), also known as the Crusade of Aragon or Crusade against Catalonia, was a military venture waged by the Kingdom of France against the Crown of Aragon. Fought as an extension of the War of the Sicilian Vespers (1282–1302), the crusade was called by Pope Martin IV in retribution for Peter III of Aragon's intervention in Sicily, which had damaged the political ambitions of the papacy and France.

The Kingdom of France, aided by the Kingdom of Majorca, led the crusade. Despite domestic opposition to the crusade, Philip III of France invaded Catalonia in 1285. While the French saw some successes on land, the Aragonese navy won control of the sea, and a badly attritted French crusader army was forced to retreat in the fall of 1285. The defeat of the French army in 1285 effectively ended fighting, and Aragon would make peace with the pope by way of the 1291 Treaty of Tarascon.

Charles, Count of Valois (12 March 1270 – 16 December 1325), was a member of the House of Capet and founder of the House of Valois, which ruled over France from 1328. He was the fourth son of King Philip III of France and Isabella of Aragon.

Charles ruled several principalities. He held in appanage the counties of Valois, Alençon (1285), and Perche. He became Count of Anjou and Maine through his first marriage to Margaret, Countess of Anjou. Through his second marriage to Catherine I, Latin Empress of Constantinople, he was titular Latin Emperor of Constantinople from 1301 to 1307, although he ruled from exile and only had authority over Crusader States in Greece.