Buddhist Dictionary of Pali Proper Names by G P Malalasekera
bhātiyavanka vihāra
Bhātiyavanka vihāra:A monastery in Ceylon.A monk of the monastery,who once went to worship at the Mahā Thūpa,saw there some devatās also worshipping; they had been born in heaven as a result of having participated in the building of the thūpa (Mhv.xxx.46f).
In the time of Dutthagāmanī,the chief incumbent of the vihāra was Mahānāga.MT.606.