Robuta

https://www.philamuseum.org/objects/18019 Adolf Friedrich Vollmer, The Guardhouse in Hamburg Harbor, 1841 | Philadelphia Museum of Art Prints, Etching and drypoint (trial proof), from 1841 adolf friedrich vollmer https://www.philamuseum.org/objects/18348 Adolf Friedrich Vollmer, View of the Grand Canal in Venice, 1839 | Philadelphia Museum of Art Prints, Etching and drypoint, from 1839 the grand canal in venice adolf friedrich vollmer