 With the fall of the Song dynasty in 1279, and the subsequent dislocation caused by the establishment of the Yuan dynasty by the Mongol conquerors, many court and literary artists retreated from social life, and returned to nature, through landscape paintings, and by renewing the "blue and green" style of the Tang era.Wang Meng was one such painter, and one of his most famous works is the "Forest Grotto".Zhao Mengfu was a Chinese scholar, painter and calligrapher during the Yuan dynasty.