Thiruneeragam Divyadesam Thiruneeragathan Temple is located In the second prakaram of Thiru Ooragam Ulahalandha Perumal Temple behind the 16 Pillar Mandapam where the Almighty is Blessing as Neeragathan, Jagadesswara Perumal under Jagadeeswara Vimanam in His Standing Posture facing East. Thayar is blessing as Nilamangaivalli Nachiyar. No clear information about the temple Vimanam, and the Utsava Murthy. This is the holy temple where Markandeya Mahirishi got His Prathyaksjham as Aalilai Krishnan.