Margaret of Brittany (1443-1469), daughter of Francis I of Brittany and Isabella Stuart, inherited the manuscript from her mother whom she succeeded as Duchess of Brittany. Margaret had a prayer added on fol. 28r-v, with an image showing her kneeling before the Virgin and Child on fol. 28r. These additions were probably made around 1455, the year of Margaret’s marriage to her cousin, the future Francis II of Brittany.
