Ashin Nandamālābhivaṃsa, commonly known by his position as Rector Sayadaw, is a Burmese Theravada Buddhist monk who currently serves as the rector of Sitagu International Buddhist Academy, and an associate head (Upaukkaṭṭh) of Shwegyin Nikaya. He also served as the rector of the International Theravada Buddhist Missionary University.
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 .