North America:

United States:

The Metropolitan Museum of Art - N.Y.C.
The Museum of Modern Art - N.Y.C.
The Guggenheim Museum - N.Y.C.
The Whitney Museum of American Art - N.Y.C.
The Philadelphia Museum of Art - Philadelphia
The National Gallery of Art - Washington, D.C.
The Smithsonian American Art Museum - Washington, D.C.
The Art Institute of Chicago - Chicago
The Museum of Fine Arts, Boston - Boston
The Minneapolis Institute of Arts - Minnesota
The Amon Carter Museum - Texas
The Brooklyn Museum of Art - N.Y.C.

Europe:

England:

The National Gallery - London
The Tate Gallery - London

France:

The Musee du Louvre - Paris
The Musee d'Orsay - Paris

Italy:

The Uffizi Gallery - Florence
The Musei Vaticani e Cappella Sistina - Vatican City
The Galleria Nazionale d'Arte Antica di Palazzo Barberini - Rome
The Peggy Guggenheim Collection - Venice

Spain:

The Museo Del Prado - Madrid
The Guggenheim Bilbao Museum - Bilbao

Asia:

Japan:

The National Museum of Western Art - Tokyo
The Kyoto National Museum - Kyoto

Russia:

The State Hermitage Museum - St. Petersburg
The Pushkin Museum of Fine Arts - Moscow

Australia:

Australia:

National Gallery of Australia - Canberra