This leaf comes from a gradual, a choral book containing the mass chants. It features a large decorated letter D introducing the Mass: Deus, in nomine tuo salvum me fac (Save me, O God, by thy name, and judge me in thy strength) from Psalm 53. Francesco d’Antonio del Cherico began his career as a goldsmith in Florence. He eventually changed his occupation to manuscript illuminator where he achieved much success. He was a pupil of Fra Angelico and became famous for being Lorenzo de’ Medici’s favorite illuminator. He gained a reputation for his well-executed illustrations in varying types of books ranging from small books of hours to large choir books. His illustrations often featured intricate floral arrangements, as seen here.