Sree Padmanabhaswamy temple (Malayalam: ശ്രീ പദ്മനാഭസ്വാമി ക്ഷേത്രം, śṟī padmaṉābhasvāmi kṣētṟaṁ ?) is a Hindu temple dedicated to Vishnu located in Thiruvananthapuram, India. The shrine is currently run by a trust headed by the royal family of Travancore. The temple is one of 108 Divya Desams (Holy Abodes of Vishnu) – principal centres of worship of the deity in Vaishnavism. The temple, constructed in the Dravidian style of architecture, is glorified in the Divya Prabandha, the early medieval Tamil literature canon of the Tamil Alvar saints (6th-9th centuries CE), with structural additions to it made throughout the 16th century CE, when its ornate Gopuram was constructed. The most recent renovations to the temple occurred in the 18th century CE. The temple features heavily in Akilam five series of the Akilathirattu Ammanai corpus, the holy text of the Ayyavazhi belief system. Services were provided to the local community with the temple’s revenue. The temple gave its name to Kerala’s state capital Thiruvananthapuram. ‘Thiru’ ‘Anantha’ ‘Puram’ means Sacred Abode of Lord Anantha Padmanabha.
The principal deity, Padmanabhaswamy, is enshrined in the “Anantha-sayanam” posture (in the eternal sleep of Yoga-nidra on the serpent Ananta). The Travancore Kings regarded themselves as ‘Padmanabha-dasa’ (Servant of Lord Padmanabha).
(source : http://en.wikipedia.org/wiki/Padmanabhaswamy_Temple )