Museum Collections Online 
The Mauritshuis
The MauritshuisThe Hague, Netherlands
The Museum of Modern Art
The Museum of Modern ArtNew York, NY
Philadelphia Museum of Art
Philadelphia Museum of Art
The Louvre
The LouvreParis, France
Dia
DiaBeacon, NY
Guggenheim Museum Bilbao
Guggenheim Museum BilbaoBilbao, Spain
Uffizi Gallery
Uffizi GalleryFlorence, Italy
San Francisco Museum of Modern Art
San Francisco Museum of Modern Art