Charles, Duke of Brittany

Blessed Charles of Blois-Châtillon
Duke of Brittany
Reign	30 April 1341 – 29 September 1364
Predecessor	John III
Successor	John IV
Born	c. 1319 Blois (France)
Died	29 September 1364 (aged 44–45) Auray
Spouse	Joan, Duchess of Brittany
Issue	John I, Count of Penthièvre Marie, Duchess of Anjou Margaret, Countess of Angoulême
House	House of Blois-Châtillon
Father	Guy I, Count of Blois
Mother	Margaret of Valois

Charles de Châtillon
Statue of Blessed Knight Charles Châtillon de Blois in the Church of Notre-Dame de Bulat-Pestivien (Bretagne)
Duke of Brittany, Patron of Europe
Born	c. 1319 Blois, France
Died	29 September 1364 (aged 44 – 45) Battle of Auray, Auray, France
Venerated in	Roman Catholic Church
Beatified	14 December 1904 (confirmation of cultus) by Pope Pius X
Feast	29 September (General Roman Calendar)
Attributes	sword, tabard with Brittany's coat of arms, armor, shield
Patronage	Army soldiers, agricultural workers

Charles of Blois-Châtillon (1319 – 29 September 1364), nicknamed "the Saint", was the legalist Duke of Brittany from 1341 until his death, via his marriage to Joan, Duchess of Brittany and Countess of Penthièvre, holding the title against the claims of John of Montfort. The cause of his possible canonization was the subject of a good deal of political maneuvering on the part of his cousin, Charles V of France, who endorsed it, and his rival, Montfort, who opposed it. The cause fell dormant after Pope Gregory XI left Avignon in 1376, but was revived in 1894. Charles of Blois was beatified in 1904.