Portrait of Frances Weston née Stuart, Countess of Portland., Anthony van Dyck, 1630s, 19th century?

Object Type: painting. Genre: portrait. Date: 1630s, 19th century?. Dimensions: height: 70 cm (27.5 in) ; width: 58.5 cm (23 in). Medium: oil on canvas. Depicted People: Frances Stuart, Countess of Portland. Collection: National Museum in Warsaw. Dyck Frances Weston