 He was one of the last important patrons of Flemish illuminated manuscripts, and commissioned perhaps the most sumptuous manuscript of the "Roman de la Rose", British Library Harley MS 4425, which has 92 large and high quality miniatures, despite a date around 1500; the text was copied by hand from a printed edition.These are by the artist known as the Master of the Prayer Books of around 1500.The Book of Hours of Engelbert of Nassau (Bodleian Library, Oxford, Ms Douce 219–220), of the 1470s or 1480s is another well-known manuscript.