Leonardo da Vinci (1452-1519) possessed arguably the greatest mind the world has ever known. Artist, draftsman, inventor, and philosopher, his contributions to modern society are profound and wide-reaching....

Throughout his life, Vincent Van Gogh (1853-1890) wrote hundreds of letters, many to his brother Theo. Theo acted as patron, agent, and sounding board to the artist whose life was fraught with poverty, a struggle for recognition, and alternating fits of madness and lucidity....