Realism and Impressionism ingeniously merge in “Paris Street; Rainy Day,” by French artist Gustave Caillebotte. Considered to be his masterpiece, this piece shows the drawbacks of isolation and idleness experienced by newly affluent city dwellers. Loneliness is conveyed through an expressionless couple, large stretches of open space and a street bleakly drained of color. Intrigued by photography, Caillebotte (1848 – 1894) deftly translated its principles into this painting’s daring composition.