Hours of Joanna I of Castile (Hours of Juana la Loca)
Gaude, flore virginali, honoreque speciali transcendis splendiferum.
Our renderingRejoice, by your virginal flower and by your special honor, you surpass all that is splendid.
What it is
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.
Why it still matters
The Joyful Mysteries sequence embedded in this manuscript maps precisely onto the first five decades of the Rosary; meditating on the same mysteries with a modern Rosary re-creates the devotional arc Joanna followed in these pages.
Kept alongside
Hours of Joanna of Castile
Horae Beatae Mariae Virginis (Hours of Joanna of Castile)
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.
Hours of Isabella the Catholic (Book of Hours of Queen Isabella I of Castile)
This richly illuminated Flemish Book of Hours, now at the Cleveland Museum of Art (Acc. 1963.256), was used by Isabella I of Castile as a personal devotional manuscript; Cleveland Museum records indicate she likely received it as a diplomatic gift, possibly from Cardinal Francisco Jiménez de Cisneros, rather than as a direct commission. Its contents follow the standard Flemish devotional program: a Marian calendar, the Little Office of the Blessed Virgin Mary in eight canonical hours, the Office of the Dead, the Seven Penitential Psalms, the Litany of Saints, and supplementary Marian prayers including the Obsecro te. Isabella, surnamed 'the Catholic,' was documented by her contemporaries as devoting more than two hours each day to private prayer; this manuscript is the surviving artifact of that practice.
Spiritual Exercises
Exercitia Spiritualia
The Spiritual Exercises is a structured four-week program of meditations, prayers, and self-examination composed by Ignatius of Loyola and first printed with papal approval from Pope Paul III in 1548. The program moves through radical self-knowledge, the life of Christ, the Passion, and the Resurrection, aiming at a thoroughgoing reordering of the will toward God. Francis Borgia, Duke of Gandia and future Jesuit Superior General, made the Exercises after his wife's death in 1546 and subsequently vowed to enter the Society of Jesus; Princess Juana of Austria (1535–1573), daughter of Charles V, secretly made the Exercises in 1554 and was admitted as a Jesuit scholastic under a male pseudonym, with Francis Borgia organising her retreat. Jesuit directors of the Exercises served as confessors to virtually every major Catholic dynasty from c. 1575 onward, making this text the single most influential Catholic devotional manual in the post-Tridentine period.