opacity: detail from The Bathers, William-Adolphe Bouguereau
opacity: detail from Bust of an African Woman, Charles-Henri-Joseph Cordier
opacity: Art Institute of Chicago - detail from Self-Portrait by Vincent van Gogh, 1887 painting, oil on artist's board.jpg
opacity: Hanging Head Dragonfly Shade on Mosaic and Turtleback Base, Tiffany Studios, attributed to Clara Pierce Wolcott, dragonfly eyes
opacity: Bust of an African Woman, Charles-Henri-Joseph Cordier
opacity: hand detail from Amedee-David, the Comte de Pastoret, Jean-Auguste-Dominique Ingres
opacity: The Bathers, William-Adolphe Bouguereau
opacity: Hanging Head Dragonfly Shade on Mosaic and Turtleback Base, Tiffany Studios, attributed to Clara Pierce Wolcott, edge and reflection
opacity: Horsemen of the Apocalypse, Carlo Carra
opacity: Bust of Said Abdullah of the Darfour People, Charles-Henri-Joseph Cordier
opacity: Art Institute - detail from Madame Paul Escudier (Louise Lefevre) by John Singer Sargeant, 1882.jpg
opacity: Art Institute of Chicago - face detail from Male Figure from the Tavern Club by Lora Marx, 333 North Michigan Avenue, Chicago, c. 1937.jpg
opacity: detail, Mummy Case of Paankenamun, Egyptian, Third Intermediate Period, Dynasty 22, 945-715 BC
opacity: Shiva as Lord of the Dance, India, 1000 - Nataraja, Chola dynasty
opacity: Art Institute of Chicago - face detail from thunderbolt deity Shukongojin, Japan, 12th-14th century, wood with traces of polychromy.jpg
opacity: Art Institute of Chicago - Greco-Egyptian octadrachm (coin) portraying Arsinoe II, issued by Ptolemy II, 261 BC.jpg
opacity: Art Institute of Chicago - detail of Shiva from bronze Shiva and Uma Seated with their son Skanda (Somaskanda), India, Tamil Nadu, Vijayangar period, c. 1400.jpg
opacity: Joan of Arc, face upturned
opacity: Buddha Seated in Meditation (Dhyanamudra), India, Chola period, 12th century, lotus in hand
opacity: detail from Houses of Parliament, London, Claude Monet
opacity: Portrait of a Woman, Jean-Leon Gerome
opacity: Georgia O'Keefe, Alfred Stieglitz
opacity: Art Institute of Chicago - detail from Divan Japonais by Henri de Toulouse-Lautrec, 1893 lithograph.jpg
opacity: Art Institute of Chicago - detail of gilt bronze Buddha seated giving the First Sermon (Dharmachakrapravartanamudra), Mongolia, 18th century.jpg
opacity: Art Institute of Chicago - hand detail from Avalokiteshvara as Guanyin - gilt copper alloy, China, Yuan-early Ming dynasty, late 14th century.jpg
opacity: Art Institute of Chicago - detail from Portrait of Jeanne Wenz by Henri de Toulouse-Lautrec, 1886 painting, oil on canvas.jpg
opacity: Art Institute of Chicago - left eye detail from Portrait of a Young Lady by Paulus Moreelse, c. 1620.jpg
opacity: Art Institute of Chicago - face detail from Portrait of a Young Lady by Paulus Moreelse, c. 1620.jpg
opacity: ring detail from Saint Catherine by Jean Bellegambe, 1520.jpg
opacity: head and hooves detail from Roger and Angelica Mounted on the Hippogriff by Antoine-Louis Barye, modeled 1840, cast 1884.jpg