American Artist, Hall Groat II, reveals his approach to chiaroscuro through a painting of three eggs on a blue cloth. An element in art, chiaroscuro (Italian for light-dark) is defined as a bold contrast between light and dark . The French use of the term, clair-obscur, was introduced by the seventeenth century art-critic Roger de Piles in the course of a famous argument on the relative merits of drawing and color in painting.( "Débat sur le coloris" ) A certain amount of chiaroscuro is the effect of light modeling in painting, where three-dimensional volume is suggested by highlights and shadow, fully developed in 15th century painting in Italy and Flanders. But true chiaroscuro is developed during the 16th century, in Mannerism and in Baroque art. Dark subjects dramatically lit by a shaft of light from a single constricted and often unseen source was a compositional device developed by Ugo da Carpi (c.1455-c.1523), Giovanni Baglione (1566--1643) and Caravaggio (1573-1610), the last of whom was essential in developing the slightly different style of tenebrism. Chiaroscuro defines objects without a contouring line, but only by the contrast between the colors of the object and of the background.