T’ien-t’ai’s three major works ［天台三大部］ ( Tendai-sandai-bu): Also, three major works on the Lotus Sutra, or three major writings of the T’ien-t’ai school. The Profound Meaning of the Lotus Sutra, The Words and Phrases of the Lotus Sutra, and Great Concentration and Insight. These three works are T’ien-t’ai’s lectures recorded and compiled by his disciple Chang-an (561–632). Miao-lo later wrote the following commentaries on them: The Annotations on “The Profound Meaning of the Lotus Sutra,” The Annotations on “The Words and Phrases of the Lotus Sutra,” and The Annotations on “Great Concentration and Insight.” Together, these six works formed the doctrinal basis for the T’ien-t’ai school.