Peter I
Count of Alençon
Born	c. 1251 Atlit,Kingdom of Jerusalem
Died	6 April 1284 Reggio Calabria
Spouse	Joan, Countess of Blois m. 1272
Father	Louis IX of France
Mother	Margaret of Provence

Peter I of Alençon (c. 1251 – 6 April 1284) was the son ofLouis IX of France andMargaret of Provence.

He becameCount of Alençon in 1269 and in 1284, Count ofBlois andChartres, and Seigneur de Guise in 1272 and 1284. He was alsoCount of Perche.^[1]

Peter was born atAtlit, Kingdom of Jerusalem,^[2] while his father led theSeventh Crusade. Back in France, he lived in Paris until 1269 when his father gave him in appanage the County of Alençon.^[3] He accompanied his father to Tunis duringEighth Crusade (1270), but this expedition was a fiasco, because of thedysentery epidemic that decimated the army of crusaders. His father and his brotherJean Tristan succumbed to the disease.

Following the death of his father in 1270, Louis IX, Peter's brotherPhilip became king of France.^[4] One of Philip III's first acts was to name Peter as regent in the event of his death.^[4] Around that time, the chaplainAndrew of Hungary became attached to Peter's court. He wrote a history of theCharles of Anjou's conquest of Sicily and dedicated it to Peter.^[5]

In December 1282, during theSicilian Vespers, Peter marched his army to Naples to assist his uncleCharles I of Sicily, stopping atReggio Calabria.^[6] By January 1283, he was atCatona, a suburb of Reggio, when he was attacked by Aragonese mercenaries and killed.^[6] His body was taken to Paris, where he was buried, with his heart interred at the now-demolished church of theCouvent des Jacobins.^[7] After his death without surviving sons, his portion of Alençon returned to the Crown.^[8] His widow did not remarry and sold Chartres in 1286 to KingPhilip IV the Fair.^[9] On her death Guise and Blois passed to her cousinHugh of the House of Châtillon.

Peter married in 1272 toJoan of Châtillon,^[10] which brought him the lands Blois, Chartres and Guise. They had two sons, namely:

• Louis (1276–1277)
• Philip (1278–1279)

• Baldwin, Philip B. (2014).Pope Gregory X and the Crusades. The Boydell Press.
• Bande, Alexandre (2009).Le coeur du roi: les Capétiens et les sépultures multiples, XIIIe-XVe siècles (in French). Tallandier.
• Berman, Constance H. (2018).The White Nuns: Cistercian Abbeys for Women in Medieval France. University of Pennsylvania Press.
• Burgtorf, Jochen (2008).The Central Convent of Hospitallers and Templars: History, Organization, and Personnel (1099/1120-1310). Brill.
• Runciman, Steven (2000).The Sicilian Vespers: A History of the Mediterranean World in the Later Thirteenth-Century (5th ed.). Cambridge University Press.
• Strayer, Joseph R. (1980).The Reign of Philip the Fair. Princeton University Press.
• Szűcs, Jenő (1999). "Theoretical Elements in Master Simon of Kéza'sGesta Hungarorum (1282–1285)". In László Veszprémy; Frank Schaer (eds.).Simon of Kéza: Deeds of the Hungarians. Central European University Press. pp. xxix–cii.
• Wood, Charles T. (1966).The French Apanages and the Capetian Monarchy, 1224-1328. Harvard University Press.

• 1250s births
• 1284 deaths
• 13th-century French nobility
• People from Haifa District
• Sons of kings
• Counts of Alençon
• Counts of Perche
• Counts of Blois
• Counts of Chartres
• Children of Louis IX of France
• French military personnel killed in action
• Christians of the Eighth Crusade

• Articles with short description
• Short description is different from Wikidata
• Use dmy dates from May 2020
• CS1 French-language sources (fr)