I. Sources 1. A newly discovered Trecento fragment: scribal concordances in late-medieval Florentine manuscripts (with Mario Fabbri) 2. The Reina Codex Revisited 3. The Squarcialupi Codex: An Edition of Trecento Songs, ca. 1410-1415 4. The Lucca Codex and MS San Lorenzo 2211: Native and Foreign Songs in Early Quattrocento Florence 5. A cautious reading of Simone Prodenzani’s Il Saporetto II. Masters 6. The Songs of Don Paolo Tenorista: The Manuscript Tradition 7. Further Notes on Magister Antonius dictus Zacharias de Teramo 8. New Insights into the Florentine Transmission of the Songs of Antonio Zacara da Teramo (with Andreas Janke) 9. Antonio Squarcialupi: Man and Myth (with James Haar) III. Institutions 10. Verso uno ‘stile internazionale’ della musica nelle cappelle papali e cardinalizie durante il Grande Scisma (1378-1417): il caso di Johannes Ciconia da Liège (con Giuliano Di Bacco) 11. The Papal Chapels and Italian Sources of Polyphony during the Great Schism (with Giuliano Di Bacco) 12. Secular Courts During the Period of the Great Schism: Documentation in the Archivio Segreto Vaticano 13. Florentine Chapel Singers, 1448-1469 (with James Haar) 14. The Medici, the Signoria, the pope: sacred polyphony in Florence, 1432–1448 (with James Haar)