Sri Neelavarna Perumal temple in the small suburb of Nanmangalam is one of the significant shrines. The village of Nanmangalam itself and surrounding areas are the abode of a large number of very ancient and traditional temples. In present times these antique temples have become thriving religious centers. However, some of these shrines, though dating back to many hundreds of years, are not well-known. The tiny temple dedicated to Lord Neelavarna Perumal near Tambaram is stationed in the small suburb of Chennai called Nanmangalam

Architecture of Sri Neelavarna Perumal temple, Nanmangalam, Chennai: -The architecture of the temple reveals the excellence of architectural craftsmanship of the contemporary era. The principal deity or the moolavar here is called Neelavarna Purana. The four armed image of the lord placed in the main sanctum is extremely captivating. The yogic image of Narasimha, assisting the principal deity is also impressive.

Inscription of Sri Neelavarna Perumal temple, Nanmangalam, Chennai: - The inscriptions engraved on the temple walls depicted the Pallava age essentially. The inscriptions reflect that the principal deity was constructed during their period and the Pallava kings were the ardent followers of the Vedic tradition. The inscriptions also pointed out the sanctum as one of the 108 Divya Desams.