The tradition of Vamsa in Pali dates back to Buddhaghosha’s era and its uninterrupted composition continued till the nineteenth or twentieth century. Although the origin of Vamsa literature is attributed to Sri Lanka and Burma, Thailand has also played a role in its development. The Vamsa literature of Sri Lanka (Dipavamsa, Mahavamsa, Culavamsa, Mahabodhivamsa, Thupa-vamsa, etc.) and Burma (Gandhavamsa, Sasanavamsa) are well known and many of them are published, but the Vamsa literature of Thailand is still unknown in academia and not available in Roman and other non-Thai scripts. At least three texts of the early Rattankosin (Bangkok) period of Thailand can be considered under this genre, (1) Sangitiyavamsa, (2) Mahayuddhakaravamsa and (3) Culayuddhakaravamsa. The present work is an attempt to publish for the first time the complete Roman edition of the Sangitiyavamsa with critical notes and indexes.