Sri Piyaratana Tissa Mahanayake Thero, also known as Dodanduwa Piyaratne Thero, was the Mahanayaka Thero of the Amarapura Nikaya, and the Sanganayake of the Southern Province. He popularised the 'Poruwa' ceremony at Buddhist weddings.

Mahanayaka theros are high-ranking Buddhist monks who oversee and regulate the Buddhist clergy in Theravada Buddhist countries. The title Maha Nayaka translates to English as 'Great Leader' and it is considered to be a very important position held by a monk in a Theravada Buddhist country. It is usually bestowed upon the senior Buddhist monks who are appointed the chief prelates of monastic fraternities known as Nikayas.