Book of Hours of Lorenzo de' Medici
Domine labia mea aperies, et os meum annuntiabit laudem tuam.
Our renderingLord, open my lips, and my mouth shall proclaim your praise.
What it is
A jewel-like devotional manuscript written by the celebrated Florentine scribe Antonio Sinibaldi in littera antiqua, signed and dated 1485, with nine full-page miniatures and held as Ms. Ashburnham 1874 at the Biblioteca Medicea Laurenziana, Florence. Lorenzo de' Medici commissioned it as one of three companion books of hours given to his daughters as wedding gifts; one intended recipient, Luisa, died before her marriage. The book follows the Roman liturgical hours, opens with an illustrated saints' calendar, and served as a personal breviary for private female devotion. It represents the intimate, jewel-like character of Medici piety — orthodox in liturgical structure and lavish in material expression.
Why it still matters
Its structure of the canonical hours — Matins, Lauds, Vespers, Compline — remains a fully usable daily prayer framework; any printed breviary or digital Liturgy of the Hours app follows the identical pattern.
Kept alongside
Psalter (for the Education of Giovanni de' Medici)
The documented use of the Latin Psalter as the basis of young Giovanni de' Medici's religious instruction by his mother Clarice Orsini is one of the most precisely attested Medici devotional education episodes. When Poliziano attempted to teach the Medici boys using Homer and classical authors, Clarice expelled him from the villa at Cafaggiolo (c. 1479) and substituted the Latin Psalter, insisting on traditional Catholic instruction. Giovanni later became Pope Leo X, giving the episode retrospective significance; it is documented through Poliziano's own letters and subsequent Renaissance scholarship. The underlying text — the Psalter itself — was the universal prayer book of medieval and Renaissance Christendom and carries the highest possible devotional relevance independent of this particular episode.
Book of Hours of Lorenzo de' Medici (MS Ashburnham 1874)
Officium Beatae Mariae Virginis
A tiny parchment codex (10 x 15 cm) signed and dated 1485 by Florentine scribe Antonio Sinibaldi and illuminated by Francesco Rosselli with nine full-page miniatures and a lavish treasure binding set with lapis lazuli and rose quartzes. The 1492 post-mortem inventory of Lorenzo de' Medici lists it among the 'libriccini delli offitii di donna' — small women's office books — confirming it was a Medici household devotional object intended for female use. It was given to Lorenzo's daughter Luisa (1477–1488), who died aged eleven before her intended marriage, so the book never served its probable purpose as a bridal devotional. Its intimate scale, precious materials, and Marian Hours content mark it as an object of private, daily prayer shaped to the rhythm of the canonical hours.
Laudi of Savonarola (including 'Gesù, sommo conforto')
Savonarola composed devotional hymns (laude) at San Marco — the Dominican convent founded and patronized by Cosimo de' Medici in Florence — that were sung by Florentine confraternities under his reform movement. The best-known, 'Gesù sommo conforto,' was preserved in Serafino Razzi's Laudi spirituali (Venice, 1563) and later translated into English by Jane Francesca Wilde as 'Jesus, Refuge of the Weary.' Razzi himself entered San Marco as a novice in 1549, making his anthology a direct institutional transmission of the Savonarolan and Medicean lauda traditions from the same house. These laude circulated alongside Lorenzo de' Medici's laude in the Razzi collection, and their reach extended well beyond Florence through Savonarola's pan-Italian preaching reputation.