The Sri Bhasya is the most famous work of Sri Ramanuja, (1017–1137). It is his commentary on Sri Badarayana's Vedanta Sutra. It was completed when he was around a hundred years old (citation required). In his commentary, Ramanuja presents the fundamental philosophical principles of Visistadvaita based on his interpretation of the Upanisads, Bhagavad-gita and other smrti texts, the previous acaryas, and of course the Vedanta-sutra itself. This is done by way of refuting Sankara's Advaita Vedanta and in particular his theory of maya. In his Sri-bhasya he describes the three categories of reality (tattvas): God, soul and matter, which have been used by the later Vaisnava theologians including Madhva. The principles of bhakti as a means to liberation (moksha) were also developed. Rāmānuja wrote the Vedānta-Dīpa and Vedānta-Sāra to aid in the overall understanding of the Sri Bhasya.
Ramanuja refers to a commentary on Brahma Sutra by Bodhāyana in the opening verse of his commentary, stating that his views are in accordance with previous masters like Bodhāyana.