"Explore 1120 pages in the manuscript New York, Pierpont Morgan Library, M. 905, better known as the Geese Book. Use the drop-down calendar to locate feasts and saints' days. Hear and see selected chants with transcriptions and translations."
"Explore 1120 pages in the manuscript New York, Pierpont Morgan Library, M. 905, better known as the Geese Book. Use the drop-down calendar to locate feasts and saints' days. Hear and see selected chants with transcriptions and translations."