- An ancient Buddhist temple situated in Thiriyaya, is believed to be the first Buddhist Stupa in Sri Lanka.
- The Stupa is highly venerated by the people as it is believed to contain the hair relics of Buddha
- The temple has an inscription written in Sanskrit, dating back to the reign of king Aggabodi VI
- The inscription mentions two merchants, Trapussaka and Vallika, who are believed to have offered food to the Buddha immediately after his enlightenment.
- According to the Pujavaliya, a 13th-century Sinhalese religious work, the two merchants came to Thiriyaya and enshrined the hair relics of Buddha there.