Kiliyanur Arulmigu Agastheeswarar Temple (historically known as Thiru Kiliyanur) is an ancient 10th-century Chola granite temple and the 33rd holy Paadal Petra Sthalam in the Thondai region of Tamil Nadu. Located along the Tindivanam–Puducherry main highway in Villupuram district, this revered shrine gets its name from the legendary celestial parrots (Kili in Tamil) and the revered sage Agastya Maharishi, both of whom performed intense penance here to worship Lord Shiva.
Enshrined in the 7th-century Tamil Tevaram hymns composed by Saint Thirugnanasambandar, the temple features a serene Chola architectural layout with a main Rajagopuram entrance, a stone vimanam over the Garbhagriha housing the Swayambhu Agastheeswarar Lingam, a separate shrine for Goddess Akilandeswari, a sacred Vilvam tree (Sthala Vriksham), and the holy Agastya Theertham. Devotees visit Kiliyanur to seek divine wisdom, speech eloquence, relief from respiratory ailments, and freedom from astrological doshams.