Two heads of old soldiers wearing helmets, both facing left and looking downwards, plate 10 from "The Principles of Design" (I principii del disegno)

Stefano della Bella · ca. 1641

Two heads of old soldiers wearing helmets, both facing left and looking downwards, plate 10 from "The Principles of Design" (I principii del disegno)

Etching

The Metropolitan Museum of Art · CC0 1.0

Lindy Arts