Buddhaghosa, a prominent figure of the fifth century, was a Sinhalese Theravādin Buddhist monk, writer, and philosopher. He dedicated his life to the study and interpretation of Buddhist texts, working primarily at the great monastery, or mahāvihāra, in Anurādhapura, Sri Lanka. His affiliation with the Vibhajyavāda school placed him firmly within the lineage of the esteemed Sinhalese mahāvihāra tradition.
Among his many contributions, Buddhaghosa is best known for his seminal work, the Visuddhimagga, which translates to 'Path of Purification.' This comprehensive text serves as a detailed summary of earlier Sinhala commentaries on the Theravāda scriptural canon. It has been recognized as the principal text on meditation within Theravāda Buddhism, as noted by scholar Sarah Shaw.
Since at least the twelfth century CE, Buddhaghosa's interpretations have shaped the orthodox understanding of Theravādin scriptures, establishing him as a central figure in Buddhist philosophy. His insights and teachings continue to resonate with both Western scholars and Theravādin Buddhists, solidifying his legacy as the most significant commentator of the Theravāda school.