father predecessor successor succession house mother birth_place death_date death_place image_size birth_date spouse issue image article_title name reign
guy i of blois-châtillon john iii john v duke of brittany house of blois margaret of valois blois -lrb- france -rrb- 29 september 1364 -lrb- aged 44-45 -rrb- auray 240px c. 1319 joanna , duchess of brittany john of guise marguerite , countess of angoulême i of blois-châtillon guy henry marie , lady carlosidebritania.jpg charles i , duke of brittany
 charles of blois châtillon 30 april 1341 -- 29 september 1364
charles i , duke of brittany

charles of blois châtillon -lrb- 1319 -- 29 september 1364 -rrb- , `` the saint '' , claimed the title duke of brittany from 1341 to his death .
charles de châtillon canonized as saint of the roman catholic church for his devotion to religion .
this canonization was later annulled denying him the church designation of saint ; he remains `` the blessed . ''
charles chattilon de blois was the nephew of the new king of france philip vi of valois , chosen by peerage of france against the claims of edward iii , by virtue of the salic law .
he also inherited the rights to the duchy of brittany by the house of penthièvre .
charles chattilon was born in blois , son of guy de chatillon , count of blois , by margaret of valois , a sister of king philip vi of france .
he was a devout man , who took piety to the extreme of mortifying his own flesh .
it is said that he placed pebbles in his shoes , wore ropes tight with knots near his flesh and confessed every night in fear of sleeping in a state of sin .
he was nevertheless an accomplished military leader , who inspired loyalty by his religious fervour .
on 4 june 1337 in paris , he married joanna of penthièvre , heiress and niece of duke john iii .
together , charles and joanna de châtillon fought the house of montfort in the breton war of succession -lrb- 1341 -- 1364 -rrb- , with the support of the crown of france .
despite his piety , charles did not hesitate in ordering the massacre of 2000 civilians after the siege of quimper .
after initial successes , charles was taken prisoner by the english in 1347 .
thomas dagworth was the official captor of charles of blois .
he was released nine years afterwards against a ransom of about half a million ecús , and resumed the war against the montforts .
