Robuta

https://www.philamuseum.org/objects/11019 Samuel Amsler, Portrait of Pope Pius VII, 1820-1821 | Philadelphia Museum of Art Prints, Engraving, from 1820-1821 portrait of pope pius vii samuel amsler https://www.philamuseum.org/objects/13940 Caspar Heinrich Merz, Portrait of Samuel Amsler, 1833 (printed 1850) | Philadelphia Museum of Art Prints, Etching and engraving, from 1833 (printed 1850)