Ruwanwelisaya

[4] King Dutthagamini then received from the Sangha the Buddha's relics upon his head in a casket and departed from the golden pavilion in the midst of manifold offerings and honours made by gods and ‘‘Brahmas’’.

He circumambulated the relic-chamber three times, entered to it from the east, and when laid the relic-casket on a silver couch one ‘‘koṭi’’ worth, that was arranged in the north side.

When the enshrining of the relics in the Great Stūpa Ruvanveli was completed, the two novices Uttara and Sumana closed the relic-chamber with the stone-blocks that were previously hidden to be used as a lid.

In the Thupavamsa numerous types of beings attended the enshrinement of the relics into the Mahathupa; including the Naga king Mahakala who until recently guarded them.

The arhat Indagutta creates a metal canopy over the universe, so that Mara will not interfere, as monks chanted the Sutta Pitaka (the Collection of Discourses delivered by the Buddha).

Furthermore, by order of king Dutugemunu, the people of Srī Lanka enshrined, along with many other objects such as golden and silver caskets, thousand more of the Buddha's relics over the relic-chamber."

[6]: 130 The stupa was damaged during the Chola conquest of Anuradhapura, but was renovated during the reign of Parakramabahu I (1153–1187), who invaded South India, capturing few parts of Pandya Nadu.