I heard that in Sriwijaya at about 7th century there was a biggest Buddhist University in the world at that time. I'tsing, a Buddhist monk from China came to Sriwijaya to learn about Buddhism.
Dharmakirti was known as the Mahaguru at that time.
Sriwijaya is known as Palembang, it's south of Sumatera Island. The answer for the crossword clue the questioner was after is: Theravada