Portrait of the surgeon Enea Fioravanti

The epigraph on the back of the painting tells us the
  identity of the sitter and the name of the artist. Among the works of this genre, the portrait is
  certainly one of Crespi's best works. The
  lack of surroundings and decorative details, together with the typical
  front-facing half-length setting, allow the viewer to focus on the quality of
  the painting. The man’s face is realistic: an antihero, aware of what his
  task entails, holding a skull, symbol of "memento mori".