Guest lecture on “Ancient Irrigation System and Myths in Sri Lanka” at the Deccan College, Pune India on 27th August 2018, organized by the Department of AICH and Archeology of the Deccan College, Pune India.
Monthly public lecture at the Royal Asiatic Society of Sri Lanka on “Shi Royal Family in China and Taiwan” (Monday 29th May 2017) was conducted by Dr. Ranasingha.
Lecture at Abhayagiri Project, Central Cultural Fund on “How can use ancient technology for avoid insecticide from the farm” was conducted by Dr. Ranasinghe on 19th May 2017 .
Guest Lecture at Central Cultural Fund Sri Lanka, on “How the village people continuing traditional ceremonies (for God and devils)” under the event titled “Intangible heritage related to the Village irrigation system” organised by the Central Cultural Fund for World Heritage nominating comity of Sri
Lanka on 1st August 2017.