The more recent restoration work of this stupa had begun in 1858 due to the efforts of Wepathaira Sumana Thera, who rediscovered Thissmaharama Vihara after making a pilgrimage to the area. He built a hut in the vicinity of the stupa and started living there to supervise the restoration works by himself. It took 16 years to complete the renovation work of the "Garbhaya", semi spherical part of the stupa which is 86 feet in height. But Wepathaira Sumana Thera could not complete the restoration of Thissmaharama stupa in his lifetime and after the death of Wepathaira Sumana Thera, Walpita Medhankara Thero, a monastic brother of Wepathaira Sumana Thera took over the renovation works. By 1878 Walpita Medhankara Thero managed to complete the restoration of "Hatharaskotwa" of the stupa and enshrined relics in it.