Leaf from an antiphonary, containing music and chant for the Mass Ordinary

Fragment: 480 x 325 mm. Contains text and music for the Mass Ordinary. Foliation written in later hand at the top of recto: "145." Incipit 145r: "Kyrie leyson." Incipit 145v: "Gloria in excelsis deo." "LXXIII" written in red at the center top of verso. Music notation: square notes on four-line staffs. Seven staves to a leaf-side.