The Gothic spirit—A “zeitgeist” not the invention of a single artist nor of a single country—The thirteenth century the beginning of the new style—Contrast between North and South, between East and West, marked in the character of artistic leaf-work—Gradual development of Gothic foliage—The bud of the thirteenth century, the leaf of the fourteenth, and the flower of the fifteenth—The Freemasons—Illumination transferred from the monastery to the lay workshop—The Psalter of St. Louis—Characteristics of French Gothic illumination—Rise of the miniature as a distinct feature—Guilds—Lay artists