This codex with its ornate miniatures and luxurious gold decoration is undoubtedly one of the most beautiful creations of French book illumination in the 13^th century. Psalters used to be the richest illuminated manuscripts in the history of book art. The Royal Psalter presumably created for Blanche de Castille, the mother of King Louis the Saint, is no exception in this respect. For the first time this fascinating artwork is now published as a true-to-the-original Fine Art Facsimile Edition.