"Antiphona" Liturgical Vellum Leaf circa 1480s: a large impressive scripted sheet of choral music created so a large choir could all read it, with finely detailed initial letters "a" in blue and red, on reverse initial letter "q". Entire manuscript in Latin on thick vellum, size 16½" x 23". "It would have been created for an important cathedral in Spain shortly before the unification under Ferdinand & Isabella and probably used in special masses to celebrate that historic event"