Link to the Image Source
National Gallery of Art

Artwork Details 

Title: Nora Mcmullen Mellon (Mrs. Andrew W. Mellon)
Dated: 1910
Medium: oil on canvas
Dimensions: 210.8 x 125.1 cm (83 x 49 1/4 in.)
Location: National Gallery of Art
City, State: Washington, D.C.