Philip IV (April–June 1268 – 29 November 1314), called the Fair (French: Philippe le Bel) or the Iron King (French: le Roi de fer), was King of France from 1285 until his death. By virtue of his marriage with Joan I of Navarre, he was also Philip I, King of Navarre from 1284 to 1305. He also briefly ruled the County of Champagne in right of his wife, although after his accession as king in 1285 the county remained under the sole governance of his wife until her death in 1305, and then fell to their son Louis until Philip's own death in 1314, after which his son acceded to the French throne and the county was finally united to the crown lands of France. Although Philip was known as handsome, his inflexible personality gained him other epithets, from friend and foe alike. His fierce opponent Bernard Saisset, bishop of Pamiers, said of him, "He is neither man nor beast. He is a statue."
Philip relied on skillful civil servants, such as Guillaume de Nogaret and Enguerrand de Marigny, to govern the kingdom rather than on his nobles. Philip and his advisors were instrumental in the transformation of France from a feudal country to a centralized state. Philip, who sought an uncontested monarchy, compelled his vassals by wars and restricted feudal usages. His ambitions made him highly influential in European affairs. His goal was to place his relatives on foreign thrones. Princes from his house ruled in Naples and Hungary. He tried and failed to make another relative the Holy Roman Emperor. He began the long advance of France eastward by taking control of scattered fiefs.
The most notable conflicts of Philip's reign include a dispute with Edward I of England, who was also his vassal due to the English king owning lands in southwestern France, and a war with the County of Flanders, another vassal, which gained temporary autonomy following Philip’s defeat at the Battle of the Golden Spurs (1302). In 1306, Philip the Fair expelled the Jews from France and, in 1307, he annihilated the order of the Knights Templar. Philip was in debt to both groups and saw them as a "state within the state". To further strengthen the monarchy, he tried to control the French clergy and entered into conflict with Pope Boniface VIII. This conflict led to the transfer of the papal court to the enclave of Avignon in 1309.
His final year saw a scandal amongst the royal family, known as the Tour de Nesle affair, during which the three daughters-in-law of Philip were accused of adultery. His three sons were successively kings of France, Louis X, Philip V, and Charles IV. Their deaths without surviving sons of their own would compromise the future of the French royal house, which until then seemed secure, precipitating a succession crisis that would eventually lead to the Hundred Years' War (1337–1453).