Copy the permalink Cassaf. 1.21, fol. 18r. Peacock Type Artwork Date 1370-1390 BergamoItaly Artist Giovannino de' Grassi (and workshop)Medium Drawing on Parchment Location Bergamo, Biblioteca Civica Angelo Mai, Cassaf. 1.21, fol. 18r (ex 10r) Inventory Expand the inventory