Jean-Marc Nattier - Miniature Portrait of César François Cassini de Thury - Google Art Project, Jean-Marc Nattier, circa 1750

Miniature portrait of french astronomer césar-françois cassini (cassini iii) (1714-1784). Date: circa 1750. Dimensions: height: 8 cm (3.1 in); width: 6.9 cm (2.7 in). Medium: watercolor on ivory. Depicted People: César-François Cassini de Thury. Collection: Walters Art Museum.