This paper was read at the Kanthaseinlai Group meeting on 13th July 1958. It argues that the Myanmar (Burmans) were Buddhist long before King Anawrahta?s (Aniruddha) conquest of lower Burma. They did not practise Theravada Buddhism, rather they observed a form of Mahayana Buddhism much influenced by Vaishnavism and native Naga (serpent) worship. With the conquest of Thaton in 1057 AD by King Anawrahta Theravada Buddhism was introduced to Central Burma. According to the excavation of Srikshetra and Hanlin the Pyu already believed in Buddhism. This paper is based on Bagan inscriptions which reveal the spread of Buddhism between AD 1000-1300.....Subject Terms: 1. Religion-Myanmar... 2. Buddhism-Myanmar-Bagan period... 3. Buddha and Buddhism... 4. Arahan, Shin... 5. Tipitaka (Buddhist Scriptures)..... Key Words: 1. Theravada Buddhism... 2. Vishnavism... 3. Brahmanism... 4. Jatakas... 5. Sasana (Buddist Religion)... 6. Paiyatti (Buddhist Religion)... 7. Pitaka (Buddhist scripture) 8. Vinaya... 9. Anawrahta, King (AD 1044-1077)... 10. Kyansittha, King (AD 1084-1112)