Sri Varadharaja Perumal Temple (Thirunangur)

Thirumanikoodam's name and its Kanaka Vimanam reflect a local tradition of this shrine as one of the more richly adorned members of the eleven-temple Thirunangur cluster. "maṇi" evokes both a jewelled chamber and the moonlight (Chandra) associated with its temple tank. Within a cluster where every shrine shares a common founding legend, Thirumanikoodam is remembered specifically for the ornamental character of its sanctum and vimanam, distinguishing it from its plainer neighbours even though the ritual and doctrinal significance across all eleven is considered equal.

As with the rest of the cluster, the temple's inclusion among the 108 Divya Desams rests entirely on Thirumangai Alvar's ten verses of mangalasasanam. There is no independent Prabandham tradition here outside his hymns, which places Thirumanikoodam firmly within the corpus of Thirumangai's extensive touring and temple-building activity across the Chola country in the 8th–9th century CE.

Temple tradition places Thirumanikoodam among the eleven Thirunangur forms that Vishnu assumed to placate Shiva during his cosmic dance of grief (tandava) after the death of his consort Sati at Daksha's sacrifice. As Shiva's fury grew and threatened to consume creation with each strike of his matted locks against the earth, the celestial deities are said to have appealed to Vishnu for intervention; Vishnu is described as manifesting in eleven distinct forms across what is now the Thirunangur village cluster, each pacifying one of the eleven forms Shiva had taken in his dance. Varadharaja ("the boon-giving lord") is the specific form worshipped at Thirumanikoodam within this shared founding narrative.

Like its neighbouring shrines, the temple's continuous worship history is closely tied to the wider Chola-period patronage of the Kaveri delta, though detailed inscriptional records specific to this one temple (as opposed to the Thirunangur cluster generally) are not well documented in readily available sources.

The temple follows the compact Dravidian plan typical of the smaller Thirunangur shrines: a single prakaram encloses one principal sanctum, over which rises the distinctive golden-hued Kanaka Vimanam that gives the temple much of its local renown. Varadharaja Perumal stands in the sanctum in abhaya hastha (the reassuring, boon-granting gesture particularly associated with this shrine's Manikkooda Nayagan darshan), with his consorts Sridevi (addressed locally as Thirumaamangal Nachiyar) and Bhudevi housed in the same sanctum rather than in separate shrines, an intimacy of scale shared by several of the Thirunangur temples.

Just outside the sanctum, the Chandra Pushkarani tank is the temple's other defining architectural feature. Local tradition holds that Vishnu relieved the moon god Chandra of a curse here in a manner that recalls the more widely known Shiva–Chandra legend told at other temples, and devotees seeking relief from Chandra dosha (an astrological affliction linked to the moon) continue to visit this tank specifically as part of their darshan at Thirumanikoodam.

The eleven Thirunangur temples are traditionally visited together during the annual Vaikunta Ekadashi season (December–January), when the processional deities of all eleven are brought out in a coordinated sequence of festivities, Thirumanikoodam's Kanaka Vimanam and its associated utsava murti take part in this shared cluster-wide celebration alongside its own more localised temple festivals.

Daily worship follows the shared schedule of the Thirunangur cluster, with the customary morning and evening darshan sessions; as with the other ten temples here, ritual timings can shift substantially during the Margazhi/Vaikunta Ekadashi season when cluster-wide festivities take precedence.