Four-Sided Pyramid by Sol Lewitt in the National G… House I by Roy Lichtenstein in the National Galler… House I by Roy Lichtenstein in the National Galler… House I by Roy Lichtenstein in the National Galler… House I by Roy Lichtenstein in the National Galler… Thinker on a Rock by Barry Flanagan in the Nationa… Detail of the Thinker on a Rock by Barry Flanagan… Stele II by Ellsworth Kelly in the National Galler… Personnage Gothique, Oiseau-Eclair by Miro in the… Personnage Gothique, Oiseau-Eclair by Miro in the… Spider by Louise Bourgeois in the National Gallery… Spider by Louise Bourgeois in the National Gallery… Spider by Louise Bourgeois in the National Gallery… Spider by Louise Bourgeois in the National Gallery… Four Sided Pyramid by Sol Lewitt in the National G… Chair Transformation Number 20B by Samaras in the… Chair Transformation Number 20B by Samaras in the… Chair Transformation Number 20B by Samaras in the… Entrance to the Paris Metropolitain by Guimard in… Entrance to the Paris Metropolitain by Guimard in… Entrance to the Paris Metropolitain by Guimard in… Entrance to the Paris Metropolitain by Guimard in… Detail of the Entrance to the Paris Metropolitain… Detail of the Entrance to the Paris Metropolitain… Aurora by Di Suvero in the National Gallery Sculpt… Aurora by Di Suvero in the National Gallery Sculpt… The Healing of Palladia by St. Cosmas and St. Dami… Detail of The Healing of Palladia by St. Cosmas an… Detail of The Healing of Palladia by St. Cosmas an… Detail of Repose by Sargent in the National Galler… Detail of Repose by Sargent in the National Galler… Repose by Sargent in the National Gallery, Septemb… Madonna and Child Enthroned by Margaritone d'Arezz… Typewriter Eraser Scale X by Oldenburg and Van Bru… Typewriter Eraser Scale X by Oldenburg and Van Bru… Typewriter Eraser Scale X by Oldenburg and Van Bru… Cubi XXVI by David Smith in the National Gallery S… Cubi XXVI by David Smith in the National Gallery S… Thinker on a Rock by Barry Flanagan in the Nationa… Fountain in the National Gallery Sculpture Garden,… Fountain in the National Gallery Sculpture Garden,… Detail of Painting and Sculpture by Tassaert in th… Painting and Sculpture by Tassaert in the National… Poetry and Music by Clodion in the National Galler… Detail of Cakes by Wayne Thiebaud in the National… Detail of Cakes by Wayne Thiebaud in the National… Detail of Cakes by Wayne Thiebaud in the National… Cakes by Wayne Thiebaud in the National Gallery, S… Detail of Look Mickey by Roy Lichtenstein in the N… Look Mickey by Roy Lichtenstein in the National Ga… Detail of Roulin's Baby by Van Gogh in the Nationa… Roulin's Baby by Van Gogh in the National Gallery,… Roulin's Baby by Van Gogh in the National Gallery,… Detail of Waterloo Bridge: Gray Day by Monet in th… Waterloo Bridge: Gray Day by Monet in the National… Detail of Both Members of this Club by Bellows in… Both Members of this Club by Bellows in the Nation… The Lone Tenement by Bellows in the National Galle… Detail of Venice: The Dogana and San Giorgio Maggi… Detail of Venice: The Dogana and San Giorgio Maggi… Detail of Venice: The Dogana and San Giorgio Maggi… Venice: The Dogana and San Giorgio Maggiore by Tur… Detail of Salem Cove by Maurice Prendergast in the… Salem Cove by Maurice Prendergast in the National… Poppies, Isles of Sholes by Childe Hassam in the N…