The Nagadeepa Purana Rajamaha Viharaya is one of the sixteen most sacred places of worship by the Buddhists in Sri Lanka. Pilgrims have been coming to the Nagadeepa since about the 1st century AC to worship at its famous Rajayathana stupa. The Rajayathana stupa was constructed by two warring Naga kings, Chulodara and Mahodara, at the site where Lord Buddha during His second visit to the country on a Bak Maha Amawaka Poya Day, five years after attaining Enlightenment, intervened and mediated in settling a dispute over the possession of a gem-studded throne. The precious throne was offered to the lord Buddha, was returned to the Naga Kings and was later enshrined in this Rajayathana stupa.
History records that the Nagadeepa Purana Rajamaha Vharaya was developed and reconstructed by pious kings, Devanampiyatissa, Dutugemunu and converted into a fully accomplished sacred place. During the period of Portuguese, Dutch and British all the Buddhist religious places were destroyed and the Nagadeepa Viharaya too has been subjected to it and Buddhists were deprived of worshiping these religious places.