where is sunday afternoon on the island of la grande jatte
Another optical trick evident in this painting is Seurat’s inclusion of an innovative painted “frame.” According to the Art Institute of Chicago, this Pointillist border is supposed to “make the experience of the painting even more intense” by adding even more colors, tones, and a textures to the composition.
Over the course of art history, certain pieces have come to symbolize entire artistic genres. Leonardo’s Mona Lisa and Michelangelo’s David, for example, define the Italian Renaissance; The Scream by Edvard Munch epitomizes Expressionism; and Pointillism is typified by Georges Seurat’s A Sunday Afternoon the the Island of La Grande Jatte.
In 1879 Georges Seurat enlisted as a soldier in the French army and was back home by 1880. Later, he ran a small painter’s studio in Paris, and in 1883 showed his work publicly for the first time. The following year, Seurat began to work on La Grande Jatte and exhibited the painting in the spring of 1886 with the Impressionists.  With La Grande Jatte, Seurat was immediately acknowledged as the leader of a new and rebellious form of Impressionism called Neo-Impressionism. 
Inspired by optical effects and perception inherent in the color theories of Michel Eugène Chevreul, Ogden Rood and others, Seurat adapted this scientific research to his painting.  Seurat contrasted miniature dots or small brushstrokes of colors that when unified optically in the human eye were perceived as a single shade or hue. He believed that this form of painting, called Divisionism at the time (a term he preferred)  but now known as Pointillism, would make the colors more brilliant and powerful than standard brushstrokes. The use of dots of almost uniform size came in the second year of his work on the painting, 1885–86. To make the experience of the painting even more vivid, he surrounded it with a frame of painted dots, which in turn he enclosed with a pure white, wooden frame, which is how the painting is exhibited today at the Art Institute of Chicago.
La Grande Jatte, toward Clichy, 2006, via wikipedia.org
Extremely disciplined and private to the point of almost complete secretiveness, Georges Seurat concentrated primarily on issues of color, light and form. Gustave Kahn often spoke about how Georges used the Panathenaic procession in the Parthenon frieze as the main visual model for this work – yet, there was not a lot of classical in the completed painting.
Dalí’s art doesn’t only appear in galleries and museums. He also did plenty of commercial work. (Fellow Surrealist André Breton nicknamed him “Avida Dollars,” or “eager for dollars.”) He created ads for De Beers Diamonds, S.C. Johnson & Company, Gap, and Datsun station wagons. (The Gap ad featured the tagline “Salvador Dalí wore khakis.”) Between 1938 and 1971, he created four covers for Vogue, and in 1945, one for Town & Country. In one example of his relentless self-promotion, he was even a celebrity spokesperson, shilling for brands like Alka-Seltzer and the French chocolate company Lanvin. Some of his commercial art endures today—you can still see his work in the Chupa Chups lollipop logo.
At first glance, Georges-Pierre Seurat’s A Sunday on La Grande Jatte —1884 seems a warm portrait of a sunny day in a lovely park. But a closer look at the Neo-Impressionist’s most famous work reveals much more.
Despite the island of La Grande Jatte looking a great deal different to how it once did, Seurat’s effort is perhaps the most similar to how it looks today. The banks of the river Seine are considerably steeper than in Seurat’s day but one spot is convincingly similar to his Grande Jatte.
Seurat utilizes this blending technique through his use of shadows. In traditional painting, shadows are primarily represented by the color black. Following the principles of pointillism, Seurat is able to define his shadows by the color that they come into contact with. The skirts of the women provide the best examples for this. The clothing of the women in the center of the piece seems to be casting a blue shadow on the ground. Seurat’s shadows here are not being defined by traditional means but are instead a combination of the colors in its proximity.