Sangharaja is the title given in many Theravada Buddhist countries to a senior monk who is the titular head either of a monastic fraternity (nikaya), or of the Sangha throughout the country. This term is often rendered in English as 'Patriarch' or 'Supreme Patriarch'.
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.
The Pāli Canon is the most complete Buddhist canon surviving in a classical Indian language, Pāli, which serves as the school's sacred language and lingua franca.
In contrast to Mahāyāna and Vajrayāna, Theravāda tends to be conservative in matters of .