The medieval Kingdom of France grew from West Francia into one of Europe’s strongest monarchies under the Capetian and Valois dynasties.
The Kingdom of France grew from the western third of the Carolingian partition of Verdun (843) into medieval Europe's paradigm monarchy: Capetian from 987, when Hugh Capet's election began the longest unbroken royal line in European history, and by 1300 the richest, most populous, and most administratively ambitious realm in Latin Christendom.
Its medieval story is the domain's expansion — Philip II Augustus taking Normandy and Anjou from King John and sealing the verdict at the Battle of Bouvines (1214), Languedoc absorbed after the Albigensian crusade, the legists of Philip the Fair humbling Pope Boniface VIII — and then the Hundred Years' War's near-death and recovery: Crécy and Poitiers, a captive king, Agincourt and the Treaty of Troyes, and the Valois resurrection under Charles VII from the Siege of Orléans (1429) to the Battle of Castillon (1453).
West Francia was born at the Treaty of Verdun in 843, Charles the Bald's share of Charlemagne's divided empire. The late Carolingian century was Viking siege — Paris's defence in 885–886 made the Robertian counts' reputation — and the crown alternated between Carolingians and Robertians until 987, when the magnates elected Hugh Capet and the succession, shrewdly managed by anticipatory coronation of heirs, never left his house again.
The early Capetians reigned over great princes — Normandy, Flanders, Aquitaine, Toulouse, Champagne — while ruling little beyond the Île-de-France, and even that imperfectly: Louis VI spent a reign subduing the robber-lords of the royal roads. Their assets were durability, the church's alliance (Saint-Denis, the anointing at Reims), and suzerainty's legal threads — assets the twelfth century's crisis, Eleanor of Aquitaine's remarriage carrying half of France to Henry II of England's Angevin empire, forced them to learn to pull.
Philip II Augustus (1180–1223) made the monarchy: he broke the Angevin empire by law and siege — Normandy falling with Château Gaillard and Rouen in 1204 after King John's condemnation by the royal court — and crushed the Welf-Flemish-English coalition at Bouvines in 1214, a victory contemporaries read as God's verdict on the dynasty. Paris got walls, Les Halles, and a university charter; the domain got baillis; the crown's revenue tripled.
His grandson Louis IX (1226–1270) added sanctity to power: the reformed coinage and enquêteurs auditing royal officials, the parlement crystallising as a supreme court, the Sainte-Chapelle built for the Crown of Thorns, two crusades and a canonisation (1297) that made every later French king "the most Christian" heir of Saint Louis. Under Philip IV the Fair (1285–1314) the machine turned on its makers' partners: Boniface VIII outfaced at Anagni, the Templars destroyed in 1307–1314, the Estates General first summoned (1302), and the legists' doctrine — the king emperor in his kingdom — became government.
The Capetian miracle failed in 1328: three sons of Philip the Fair dead without male heirs, and the assembled peers passing the crown to Philip VI of Valois over Edward III of England's claim through his mother. War came in 1337, and with it the century of catastrophe: the Battle of Crécy (1346) and Calais lost; the Black Death from 1348; the Battle of Poitiers (1356) taking John II captive; the Jacquerie and Étienne Marcel's Paris in revolt; a third of the realm signed away at Brétigny (1360).
Charles V and Du Guesclin clawed it back by fortress and Fabian war, but Charles VI's madness delivered France to the Armagnac-Burgundian feud, the Battle of Agincourt (1415), and the Treaty of Troyes (1420) that disinherited the Dauphin for Henry V's line. The recovery from the "kingdom of Bourges" was the era's great reversal: Joan of Arc at the Siege of Orléans and the Battle of Patay (1429), the Reims coronation of Charles VII, Burgundy reconciled at Arras (1435), the standing companies and the Bureau brothers' artillery — and the end at the Battle of Formigny (1450) and the Battle of Castillon (1453), leaving England only Calais.
Capetian government grew from household to state along visible rungs: the great officers (seneschal, chancellor) tamed or left vacant; Philip Augustus's salaried baillis and southern sénéchaux superimposed on the prévôts; Louis IX's enquêteurs auditing them; the curia regis specialising into the parlement of Paris (justice), the chambre des comptes (audit, fixed 1320), and the conseil. Legists trained on Roman law — Nogaret's generation — supplied the doctrine of sovereignty; the appanage system parked royal cadets on great fiefs, with mixed long-term results (Burgundy above all).
Consent institutions grew war by war: the Estates General from 1302, provincial estates bargaining taxes; the crisis of 1356–1358 extracting the Great Ordinance before reaction buried it; and the war's end leaving the crown what no medieval rival possessed — permanent taxation (taille, aides, gabelle) and a standing army (the compagnies d'ordonnance, 1445) — the fiscal-military state in embryo, with the parlement registering (and occasionally remonstrating against) its laws.
Hugh Capet, 987–996 — the elected founder; his house held the throne in the direct line for 341 years.
Louis VI the Fat, 1108–1137 — tamed the domain's robber-lords and married his heir to Eleanor of Aquitaine.
Louis VII, 1137–1180 — crusader-king whose divorce handed Aquitaine to the Plantagenets.
Philip II Augustus, 1180–1223 — conqueror of Normandy (1204), victor of Bouvines (1214), builder of the administrative crown.
Louis VIII the Lion, 1223–1226 — invader of England, conqueror of Poitou, and the crown's entry into Languedoc.
Louis IX (Saint Louis), 1226–1270 — the reformer-crusader canonised in 1297; medieval kingship's moral benchmark.
Philip III the Bold, 1270–1285 — Toulouse absorbed; the disastrous Aragonese crusade.
Philip IV the Fair, 1285–1314 — Anagni, the Templars, the Estates General: sovereignty's sharpest medieval statement.
Philip VI of Valois, 1328–1350 — first Valois; Crécy and the plague opened his dynasty's ordeal.
John II the Good, 1350–1364 — captured at Poitiers; died in honourable London captivity.
Charles V the Wise, 1364–1380 — with Du Guesclin, reversed Brétigny without a pitched battle.
Charles VII the Victorious, 1422–1461 — from "king of Bourges" to Formigny and Castillon: the war won, the tax-state and standing army founded.