Shan-tao wrote a four-fascicle commentary on this sutra, and based his Pure Land doctrine and practice on it. Honen (1133-1212), the founder of the Jodo school, inherited Shan-tao's Pure Land thought and exclusively practiced the nembutsu. One of his leading disciples and the founder of Seizan school, Shoku (1177-1247), inspected the Taima Mandala and wrote an extensive commenary, and also had copies of it made and distributed them throughout Japan. The tradition of using this mandala as an aid to understanding the context of the Contemplation Sutra came to be established in Jodo school, and many commentaries were compiled. Little or nothing has been known of the mandalas of the other two Pure Land sutras. Fortunately, we have now those mandalas as well. The late Mr. Harold Stewart (1916-95), a Buddhist poet from Australia, purchased hanging scrolls of the mandalas of the Three Sutras in Kyoto during the 1960's to 1980's.