Gradual or antiphonary
Possibly from an antiphonary beginning the text "Astiterunt reges terrae" (sung at matins on Good Friday).
Book Decoration and Musical Notation
The historiated initial is drawn in tempera, black ink, and gold leaf. It has been attributed to Niccolò di Giacomo da Bologna (see Palladino).
De Ricci, 1705 (A.18)
P. Palladino, Treasures of a lost art (Metropolitan Museum of Art 2003), no. 11, with illustration