Impressionist paintings of Paris often depict a city full of sun-dappled socialites: dancing, shopping, boating and schmoozing. But for painter and art patron Gustave Caillebotte, Paris was a darker, lonelier place. His 1877 work, Paris Street; Rainy Day, shows Parisians making their way down a vast street on a dreary day. (Click enlarge to see the full painting.)