File:Portrait of Madame Jean Tronchin (née Anne Molènes), Jean-Étienne Liotard, 1758, pastel on vellum, 63.6 by 50.6 cm, Louvre, Paris.jpg - Wikimedia Commons
Jean-Etienne Liotard (Geneva 1702-1789), A pensive woman on a sofa - Alain.R.Truong
Pastel Perfect: a rare chance to see Jean-Étienne Liotard's portraits in Britain | Apollo Magazine