Click on the image to see the detail in a zoomable context.
Detail from Improvisation, Childe Hassam, 1899
Detail from Venus Rising from the Sea, Titian, 1520
Detail from Assumption of the Virgin, Titian, 1516-1518
Detail from At the Races in the Countryside, Edgar Degas, 1869
Detail from Virgin and Child on the Throne, Neri di Bicci, 15th Century
Detail from Mary Cassatt, Edgar Degas, 1880-1884
Detail from The Sacrifice of Isaac, Andrea del Sarto, about 1522
Detail from Saint John the Baptist, Raffaellino del Garbo , about 1505
A reblog of sorts from jaded-mandarin.tumblr.com with zoomable context added.
Detail from The Garden Of Earthly Delights, Hieronymus Bosch, 1490 - 1510