Sri Devadirajan Temple is a Lord Vishnu temple in Therezhundur in Nagapattinam district of Tamil Nadu. It is one of the 108 divya desam, where Lord Vishnu was worshipped by Thirumangai Alwar.
The Lord Vishnu shows his presence in 13 feet height and is made of Salgramma stone. There is also Bhaka Prahalada besides him and Markendaya Maharishi.

108 Divya Desam
This temple is one of the important Divya Desam in this earth known as Bhuloka Vaikuntam- abode of Vishnu on earth. Various Alwars have composed poems on Lord Vishnu – 6500 years back according to legends. Their composition of poems on Lord Vishnu temples all over India is known as Divya Prabandham which was compiled in 9th century.