Facts: - death place: chateau de l'hermine - succession: duke of brittany ; count of montfort - reign: 29 august 1442 -- 18 july 1450 - successor: peter ii - spouse: yolande of anjou isabella of scotland - predecessor: john vi - mother: joan of france - death date: 17 july 1450 - house: house of montfort - father: john vi - birth date: 11 may 1414 - issue: renaud brittany marie , viscountess of rohan , count of montfort margaret , duchess of - image: franta1.jpg - birth place: vannes - religion: roman catholicism Based on these bullet points, write a short biography describing the life of francis i , duke of brittany .
francis i -lrb- in breton fransez i , in french francois i -rrb- -lrb- vannes/gwened , 14 may 1414 -- 18 july 1450 , chateau de l'hermine / kastell an erminig -rrb- , was duke of brittany , count of montfort and titular earl of richmond , from 1442 to his death .he was son of duke john vi and joan of france .