Home › Authors › UNESCO-Sri Lanka Cultural Triangle 👤 UNESCO-Sri Lanka Cultural Triangle 4 books Books by UNESCO-Sri Lanka Cultural Triangle Sigiriya Project Sigiriya Project 1992 Abayagiri Vihāra Project, Anur Abayagiri Vihāra Project, Anuradhapura 1989 Alahana Parivena project, Polo Alahana Parivena project, Polonnaruva 1988 UNESCO-Sri Lanka Project of th UNESCO-Sri Lanka Project of the Cultural Triangle 1980