Authentic medieval manuscript leaf from a large-format Gregorian chant antiphonary, likely dating to circa 15th-early 16th century. These leaves are written on genuine vellum (animal parchment) with traditional square neumes in black ink on red four-line staves, typical of liturgical choir books used in monasteries and churches. Each leaf features large Gothic script and decorative initials in period style. Material: vellum (parchment). Script: Gothic bookhand with square Gregorian chant notation. Format: large choir book size (15×21 inches). Original leaves from a disbound antiphonary manuscript. These large-format chant leaves were created for choir use, allowing multiple singers to read from a single book. They display beautifully and are ideal for framing, collecting, or study. Guaranteed authentic medieval manuscript material, not a modern reproduction. Please see photos for condition and details.