sentences:  Dr. John Plummer, Curator of Medieval Manuscripts at the Morgan Library, suggested that this Horae was commissioned for the wedding in 1430, but it required time to complete.The Hours was produced in Utrecht and not completed until after 1434, probably around 1440.The earlier date is based on the picture of a coin, minted in 1434 by Philip the Good, Duke of Burgundy, shown in the border of M. 917, p. 240; Plummer, Plate 117.