Portrait of a physician, possibly Giovanni Guglielmo Riva (1627–1677), seated half-length, holding a surgical instrument, Guillaume Courtois

Dimensions: unframed: 100.5 x 74.9 cm.; 39½ x 29½ in.; ; framed: 140.9 x 117.8 cm.; 55½ x 46½ in.. Medium: oil on canvas, wood. Portrait of a physician, possibly Giovanni Guglielmo Riva