Ruvanvelisaya Dagoba. Popularly regarded as the greatest, and certainly the most popular among the Buddhists, of the stupas at Anuradhapura. Ruwanveli Seya, is the pride of the Great Emperor Dutugamunu. Raised in 140 BC, this dagoba is supposed to have the perfect water bubble shape. Also impressive is the magnificent Elephant Wall which carries the terrace and the dagoba.