Ms. written and illuminated in Milan, Italy (calendar for use of Ravenna), in or just before 1386 (table of lunar and solar computations begins with the year 1386).
Artist: a follower of Giovannino de' Grassi.
Includes saints particular to Ravenna: Calocen (Feb. 11); Liberius (Apr. 29); Dati (July 3); Probi (Nov. 10); Proclus (Dec. 1) and Petri Ravenatis (Dec. 3).
Decoration: 1 historiated initial, 12 zodiacal drawings, 1 zodiacal man, 1 moveable diagram with dial.