Karesansui gardens (???) or Japanese rock gardens, became popular in Japan in the 14th century thanks to the work of a Buddhist monk, Mus? Soseki (1275–1351) who built zen gardens at the five major monasteries in Kyoto. These gardens have white sand or raked gravel in place of water, carefully arranged rocks, and sometimes rocks and sand covered with moss. Their purpose is to facilitate meditation, and they are meant to be viewed while seated on the porch of the residence of the h?j?, the abbot of the monastery. The most famous example is Ry?an-ji Temple in Kyoto.