Hours of Joanna of Castile
Horae Beatae Mariae Virginis (Hours of Joanna of Castile)
Sancte angele, qui meus es custos, rege me, custodi, guberna et illumina.
Our renderingHoly angel, who art my guardian, rule me, keep me, govern me, and enlighten me.
What it is
A lavishly customised Bruges Book of Hours (British Library, Add. MS 18852) produced for Joanna of Castile between 1496 and 1506 by masters of the Ghent-Bruges school. It combines the Hours of the Virgin, a Guardian Angel Office, and a Rosary section with a striking Speculum Conscientiae miniature—a skull reflected in a concave mirror—that frames the Ten Commandments, seven mortal sins, the sacraments, and the cardinal virtues as a portable catechetical compendium. Scholarly analysis by Lesley K. Twomey (MDPI Religions, 2020) demonstrates how Joanna personalised prayers and imagery, placing herself under the Virgin's protection in a deeply intentional formation practice. The manuscript embodies the Trastamara model of devotion through material objects, inherited directly from Isabella I's own practice.
Why it still matters
The Speculum Conscientiae section—commandments, sins, virtues, and sacraments arranged in one opening—functions as a ready-made examination of conscience for use before confession today; the Guardian Angel prayer remains an active Catholic devotion.
Kept alongside
Hours of Queen Isabella the Catholic (Cleveland Book of Hours)
Horae Beatae Mariae Virginis
A 558-page Flemish parchment manuscript produced c. 1500–1504 for Queen Isabella I of Castile, bearing her coat of arms on the frontispiece and now held at the Cleveland Museum of Art (MS 1963.256). Illuminated by Alexander Bening, Gerard David, and associates of the Ghent-Bruges school, it contains a Marian Office, Little Hours, Office of the Dead, Penitential Psalms, Litany, and private prayers arranged for daily lay devotion. The manuscript was the vehicle through which Isabella observed the canonical rhythm of prayer throughout each day, and its combination of Flemish pictorial luxury with strict liturgical structure reflects the Isabelline fusion of public magnificence and intimate personal piety. It stands as one of the finest surviving examples of the late Flemish Book of Hours tradition applied to the devotional needs of a reigning monarch.
Book of Hours of Catherine of Aragon (Hardouyn edition)
Hore intemerate Virginis Marie ad usum Romanum
A parchment Book of Hours printed in Paris by Germain Hardouyn, owned by Catherine of Aragon, the youngest daughter of Isabella I and the queen who perpetuated her mother's devotional pattern in the English court. The Morgan Library holds Catherine's copy; Anne Boleyn owned another copy of the same edition, making it a document of both piety and court rivalry. Catherine is documented rising at midnight to recite Matins and at dawn to hear Mass—the exact daily cycle of prayer this book structures. Her lifelong membership in the Third Order of St. Francis and her hours-long daily devotional practice echo the formation she received under her mother Isabella's supervision at the Castilian court.
Hours of Joanna I of Castile (Hours of Juana la Loca)
This opulent Flemish Book of Hours was produced for Joanna I of Castile (1479–1555) and her husband Philip the Handsome (Philip I of Castile) around 1496–1506 and is now held at the British Library (Add. MS 18852). Its liturgical heart is the Hours of the Virgin arranged in eight canonical divisions and structured around the Joyful Mysteries of Mary's life, from the Annunciation through the Presentation in the Temple. Supplementary Marian antiphons — including Gaude flore virginali and Gaude sponsa cara Dei celebrating Mary's virginity and queenship — and donor portraits of Joanna kneeling in prayer complete the devotional program. The manuscript embodies the Trastámara-Habsburg dynastic synthesis at the turn of the sixteenth century and survives in exceptional condition as a record of royal Marian piety at the moment of Spanish imperial formation.