The Girihandu Seya stupa is located in Thiriyaya in Trincomalee District of Eastern Province, Sri Lanka. According to the legend, this is the stupa mentioned in the story of Thapassu and Bhalluka two traders. As such, it is considered to be the first Stupa built by enshrining the relic of Lord Buddha and probably it was built around 528 B.C.
The stupa was originally a small in size and had been renovated in the 8th century A.D. The Vatadage encircling stupa was built during the renovation.