Udugama Sri Buddharakkitha Thero was a Sri Lankan Buddhist monk, who was the 20th Mahanayaka of the Asgiriya chapter of Siyam Nikaya. He was presented with the religious title of Agga Maha Pandita by the government of Myanmar on March 7, 2007, in recognition of his contribution to the purification, perpetuation and propagation of Buddhism. His complete title was Most Venerable Agga Maha Panditha Udugama Sddharmakirthi Sri Dhammadassi Rathanapala Buddharakkhithabhidhana Mahanayaka Thero.
Theravāda is the most commonly accepted name of Buddhism's oldest existing school.
The school's adherents, termed Theravādins, have preserved their version of Gautama Buddha's teaching or Buddha Dhamma in the Pāli Canon for over a millennium.
Aided by the patronage of Mauryan kings like Ashoka, this school spread throughout India and reached Sri Lanka through the efforts of missionary monks like Mahinda.
Starting at around the 11th century, Sinhalese Theravāda monks and Southeast Asian elites led .