A masterpiece of illumination is the circa 1415 book "Les Très Riches Heures du" this duke
... Heures (The Very Rich Hours of the Duke of Berry) is a richly decorated 
book of ... September The undisputed masterpiece of Gothic illumination is the 
Trs ..... Aot, in "Trs Riches Heures du duc de Berry", illuminator: 1411/1415,... [DOC] [TLE] Les Tres Riches Heures du duc de Berry: Juin, c. 1415.