Built by King Dutugamunu (161-137 BC) and was his first stupa to be constructed. It was fully restored by the Department of Archaeology in 1993. The extent of this land is about 50 acres (20 ha). Although the king Kasyapa I and Kasyapa V renovated this, from time to time it was dilapidated. What stands now today is the Stupa with these renovations done in 1993.