"Portrait of a lady, three-quarter-length, in a blue silk dress with a crimson bodice and shawl" - "Portrait of a young woman on the terrace of a palace", Louis-Michel van Loo
Portrait of a young lady, presumably maría antonia of spain (1729-1785), daughter of philip v of spain
identification proposed by user ecummenic (talk) based on the comparison with a depiction of that princess by louis-michel van loo (see image below). Object Type: painting. Date: 18th century. Dimensions: height: 101.6 cm (40 in); width: 82.6 cm (32.5 in). Medium: oil on canvas. Collection: Unidentified location. Attributed to Desmarées - Portrait of a Princess