Sri Andalukkum Aiyyan Perumal Temple

Thirumangai Alvar sang a single pasuram glorifying this temple, one of the shorter mangalasasanam counts among the 108, but enough to secure Adanur's place in the fixed canon of Divya Desams. The temple's real distinguishing feature is its Pranava Vimanam: the sanctum is built so that the deity's image is visible only up to the knee, a form shared with a well-known legend at Srirangam holding that the world will come to an end if the image's feet are ever seen. That shared architectural idea links this modest village shrine directly to the very first and grandest of the 108.

Temple tradition holds that the deity, known here as Andalukkum-aiyyan ("the lord who measures/protects"), appeared to rescue an affluent devotee who was trying to save his own idol from harm, and is also believed to have appeared before Kamadhenu, the divine wish-fulfilling cow, and before Thirumangai Alvar himself during his travels through the region.

Beyond the legend, the temple is traditionally said to have been built by the Chola king Aditya I, with later contributions recorded from the Vijayanagara-era Thanjavur Nayaks and, still later, the Maratha rulers of Thanjavur, three separate dynasties adding to the shrine across several centuries.

The temple is built in Dravidian style with a modest three-tier Rajagopuram, modest in scale compared to the larger Divya Desams nearby. Its most distinctive architectural feature is the Pranava Vimanam over the sanctum, designed so that only the upper portion of the deity's image is visible to devotees, the same symbolic form associated with the far larger Ranganatha at Srirangam.

Daily worship follows the customary schedule of the Kumbakonam-area Divya Desams, with Andalakkum Aiyan and Ranganayaki Thayar both receiving morning and evening pooja.