Head of a bearded old man, turned in profile to the left, crowned with laurels and wearing a fur on his shoulders, plate 20 from 'I principii del disegno' (The Principles of Design), c. 1641, Stefano della Bella; Publisher: Pierre Mariette I, Italian (Florence), Italian (Florence), 1610-1664, 4 11/16 × 5 3/4 in. (11.91 × 14.61 cm) (plate)5 7/16 × 6 1/2 in. (13.81 × 16.51 cm) (sheet), Etching, France, 17th century, The accomplished Florentine etcher and draftsman Stefano della Bella produced this drawing manual in France, where he spent over a decade of his career. The book, now disassembled, comprised 25 etchings and was published by della Bellas principal French publisher Pierre Mariette.