Opus Tripartitum
Opus tripartitum de praeceptis Decalogi, de confessione, et de arte moriendi
Homo christianus debet scire articulos fidei, mandata decalogi, orationem dominicam et sacramenta ecclesiae.
Our renderingA Christian ought to know the articles of faith, the commandments of the Decalogue, the Lord's Prayer, and the sacraments of the Church.
What it is
Jean Gerson's Opus Tripartitum — three short practical treatises on the Ten Commandments, the method of confession, and the art of dying well — was one of the most widely copied Latin pastoral texts of the fifteenth century, circulating far beyond court circles into parishes, schools, and early print runs. A Burgundian ducal household member commissioned a manuscript copy around 1410 (Koninklijke Bibliotheek van België, MS 11133-35), and by 1477 the dukes owned at least five Gerson manuscripts — more than any other theologian in their library — acquired precisely for practical spiritual utility despite the political tensions between Gerson and the ducal house. The ars moriendi section of the Opus was the seedbed for an entire genre of late-medieval preparation-for-death literature. Gerson designed the whole work explicitly for laypeople and less-educated clergy, giving it an accessibility that drove its extraordinary manuscript and early print diffusion.
Why it still matters
The ars moriendi section offers one of the most direct and comforting Christian meditations on dying still available; the examination-of-conscience questions in the confession section can be used exactly as written for personal preparation before confession or a quiet-day review.
Kept alongside
The Imitation of Christ
De Imitatione Christi
Written by Thomas à Kempis in the Netherlands in the circle of the Brethren of the Common Life — the same Devotio Moderna movement that directly shaped Margaret of York's documented devotional practice and the piety of Isabella of Portugal at the Burgundian court — the Imitation became the most copied vernacular religious text in 15th-century Europe, circulating in thousands of manuscripts and hundreds of early printed editions. Its four books move from the vanity of worldly learning through conformity to Christ, inward consolation, and finally the sacrament of the Eucharist, forming a complete program of interior conversion. No specific ducal inventory copy has been identified linking this text to Valois-Burgundy by name, but its presence in court circles of this era and region is established through movement history rather than document. It remains the second most widely read Christian book after the Bible.
Hours of Mary of Burgundy
Getijdenboek van Maria van Bourgondië
One of the supreme achievements of Flemish manuscript illumination, this Book of Hours (Vienna, Österreichische Nationalbibliothek, Cod. Vindobonensis 1857) was made c. 1470–1477 for Mary of Burgundy herself — feminine gender endings in the prayers and recurring pairs of gold armorial shields point to production for her forthcoming marriage, and no surviving document identifies any other commissioner or donor. Its famous 'window miniatures' depict Mary at prayer gazing through a painted window onto Gospel scenes, making the act of private devotion itself the subject of the art and establishing a compositional model that influenced Flemish painting for generations. The manuscript contains the standard Hours of the Virgin, Penitential Psalms, Office of the Dead, and suffrages to saints, all in a refined Flemish Batarda script attributed to Nicolas Spierinc. It passed through the Habsburg inheritance and remains one of the most studied and reproduced devotional manuscripts in the world.
Prayer Book of Charles the Bold
Livre de prières de Charles le Téméraire
Court payment records of January and July 1469 document payments to scribe Nicolas Spierinc and illuminator Lieven van Lathem respectively for what is now J. Paul Getty Museum Ms. 37 — Charles the Bold's personal pocket prayer book. The small volume grew across two illumination campaigns to contain 47 miniatures and decorated borders on every page, the second campaign (c. 1480–1490) added by a French illuminator after Charles's death in 1477. Its contents are Christocentric and Marian: penitential collects, prayers before and after Communion, litanies, and suffrages to patron saints, reflecting the Burgundian court's ideal of intense private piety fused with luxury craftsmanship. As an intimate personal companion carried by a ruling duke, it represents the highest expression of late-medieval lay devotion.