Introduction
The Llangattock Breviary, originally comprised of more than 500 leaves, was created as a luxury liturgical manuscript for Leonello d'Este (1407-1450), Marchese of Ferrara, by Giorgio d'Almagna and assistants during the years 1441-1448. Leonello was born into tremendous wealth that permitted him to serve as patron to the most eminent thinkers, writers, artists, and musicians of the day, including Guarino da Verona, Leon Battista Alberti, Giovanni Bellini, Andrea Mantegna, Pisanello, and Guilluame Dufay. Leonello's court at Ferrara was a center for artistic exchange and accomplishment, and he spared no expense for works of the highest quality.