Hours of Isabella Stuart

The Hours of Isabella Stuart, Duchess of Brittany are an illuminated Book of Hours produced at Angers around 1417/18 (or 1431?) in the workshop of the Rohan Master. It was not written especially for its namesake, Isabella Stuart, but she was one of its earliest owners. It follows the Paris liturgy of the Hours, measures 24.8 by 17.8 cm and has 234 folios. It is now in the Fitzwilliam Museum, Cambridge.

...
Wikipedia