The Très Riches Heures du Duc de Berry, or Très Riches Heures, is the most famous and possibly the best surviving example of manuscript illumination in the late phase of the International Gothic style. It is a book of hours: a collection of prayers to be said at the canonical hours. It was created between c. 1412 and 1416 for the extravagant royal bibliophile and patron John, Duke of Berry, by the Limbourg brothers. When the three painters and their sponsor died in 1416, possibly victims of plague, the manuscript was left unfinished. It was further embellished in the 1440s by an anonymous painter, who many art historians believe was Barthélemy d'Eyck. In 1485–1489, it was brought to its present state by the painter Jean Colombe on behalf of the Duke of Savoy. Acquired by the Duc d'Aumale in 1856, the book is now MS 65 in the Musée Condé, Chantilly, France.

An illuminated manuscript is a formally prepared document where the text is decorated with flourishes such as borders and miniature illustrations. Often used in the Roman Catholic Church for prayers and liturgical books such as psalters and courtly literature, the practice continued into secular texts from the 13th century onward and typically include proclamations, enrolled bills, laws, charters, inventories, and deeds.