Judith Leyster signed her paintings with a unique symbol: her initials interwoven with a lodestar. This visual translation of her last name means "guiding light" in Dutch. But for 200 years after her death Leyster's light was blacked out in the art world. Until the late 1870s her work was attributed
Giotto di Bondone, whom art historians designate the first painter of the Italian Renaissance, was apparently discovered while sketching sheep. A well-known Florentine artist looked over the boy's shoulder and was impressed by what he saw -- so impressed that he persuaded Giotto's father to let the l