 Poyamalu Viharaya is the oldest section of the Vihara complex which is today recognized as an archaeologically protected monument.This temple is believed to be built by Senasammatha Vickramabahu (1473-1511) along with a stupa and a double storey ordination hall ("Uposhathagaraya") in late 15th century or in early 16th century.It was originally build as the residence of three monks but today it houses many Buddhist monks including the monks of "Karaka Sangha Sabha" (executive council) of Malwatta chapter of Siyam Nikaya.