This new project examines a group of cuttings from a richly illuminated choir book in the Rosenwald Collection at the National Gallery of Art. Excavating their original liturgical context, I argue the parchment fragments come from a Gradual created for the Observant Hieronymites of San Isidoro del Campo, near Seville. Beyond discovering new evidence for their patronage and iconography, I also aim to reimagine the cultural processes behind fragmentation and reuse. As part of this research, I designed the program “Fragments and Frameworks: Illuminated Manuscripts and Illustrated Books in Digital Humanities” to take place in spring and fall of 2021.