Ms. single leaf, perhaps from a psalter; written and illuminated in Milan, Italy, in the second quarter of the 15th century.
Musical notation: on verso, 4-line stave in red ink, with square notes.
Text on verso: sanctam.
Decoration: 1 historiated initial with three martyrs.
Artist: Girolamo da Milano, the Olivetan Master.
Matted with Pierpont Morgan Library. MS M.558.2.