There are a very large number of inscriptions stamped on the on the outer walls of the main sanctum and on the steps leading to it. These inscriptions not only point to the chronological significance of the temple rather provide some important information relevant to Sri Vaikunthavasa Temple. The oldest of these inscriptions belongs to the reign of the last Pallava king Aparajitavarman, as the historians have revealed. The Pallava king Aparajitavarman ruled from his capital-city of Kanchipuram during the 905 A.D as the inscriptions revealed. This inscription also points that this ancient temple was in active worship in the early years of the tenth century A.D. This inscription records the registration of the gift of land to the temple of Tirumetrali-Devar at Nenmali by a person named Sattandai Sutthamallan.

Numerous inscriptions of the Chola age, beginning from the time of Parantaka Chola I of the 10th century A.D., record the numerous gifts and endowments made to this Vishnu temple by people from all strata of society. These epigraphic evidences clearly point out that this shrine must have played an important role in the religious as well as the socio-cultural sphere in ancient times. The part played by the "Ur" and the ` Sabha`, the local administrative organizations of the Pallava and Chola ages in the management of the temple are clearly evident from the facts depicted in these inscriptions. The achievements of the Rashtrakuta kings of the ancient Karnataka area who ruled over this territory for some time are etched on this temple. One of these inscriptions mentions that this shrine was renovated by a chief called Kilakkayittru-Tiruvadi, belonging to the Rashtrakuta dynasty. Many other epigraphs of later times are also engraved on the temple walls, which mostly records donations to this temple.

Thus the inscriptions provide the temple with a dignified magnificence. The inscriptions are also the added grandeur to the antiquity of the temple.

However Sri Vaikunthavasa Perumal temple is also considered immensely sanctified. It is widely believed that those desirous of getting married should worship Lord Vaikunthavasa according to a certain prescribed procedure to fulfill their wishes. The mode of worship followed in this temple is according to the codes of the Pancharatra Agama. The sanctified temple is also considered as an abhimana-Sthala and a prarthana-Sthala. It is so pleasing to see that this carefully maintained temple is more than a thousand years old. Presently this consecrated place is a great centre of religious activity and it still continues to arrange celebrations during the pujas and rituals. During this time a chink of devotees are drawn to the temple precincts not only from Nemili but from afar as well, all through the year.