to Sthalapurana, the world became a dark and a dangerous place when
rakshasa disturbed and prevented Brahma from conducting yagna. The
Lord appeared and brought light and life back to mankind and hence
called Deepaprakasar (Vilakkoli Perumal).
Swami Nigamanta Desika's avathara sthala.
The Moolavar is Deepaprakasar, Villakoli Perumal, Divyaprakasar
seen in standing posture facing west. When Brahma was immersed in
deep penance, the asuras submerged the whole world in darkness.
Lord Vishnu appeared as a bright light to drive away the darkness
and hence the name Deepaprakasrar (deepam - light).
Thaayaar - Maragadavalli.
Theertham - Saraswathi Theertham.