Padmanabhaswamy Temple is located in Thiruvananthapuram, Kerala, India. The temple is built in an intricate fusion of the indigenous Kerala style and the Tamil style (kovil) of architecture associated with the temples located in the neighbouring state of Tamil Nadu, featuring high walls, and a 16th-century Gopuram... The principal deity Vishnu is enshrined in the "Anantha Shayanam" posture, the eternal yogic sleep on the serpent Adisheshan.More at the link. Photo cropped for size and adjusted for exposure and contrast from the original.
The Temple has been referred to in the (only recorded) Sangam Period of literature between 500 BCE and 300 CE several times. Many conventional historians and scholars are of the opinion that one of the names that the Temple had - "The Golden Temple" - literally was in cognizance of the fact that the Temple was already unimaginably wealthy by that point. Many extant pieces of Sangam Tamil literature and poetry, and even the later works of Ninth Century Tamil poet-saints like Nammalwar, refer to the Temple and even the city as having walls of pure gold. At some places, both the Temple and the entire city are often eulogized even as being made of gold, and the Temple as Heaven
While vault B remains unopened, vaults A, C, D, E and F were opened along with some of their antechambers. Among the reported findings, are a three-and-a-half feet tall solid pure golden idol of Mahavishnu, studded with hundreds of diamonds and rubies and other precious stones. Also found were an 18-foot-long pure gold chain, a gold sheaf weighing 500 kg (1,100 lb), a 36 kg (79 lb) golden veil, 1200 'Sarappalli' gold coin-chains that are encrusted with precious stones, and several sacks filled with golden artifacts, necklaces, diadems, diamonds, rubies, sapphires, emeralds, gemstones, and objects made of other precious metals. Ceremonial attire for adorning the deity in the form of 16-part gold anki weighing almost 30 kilograms (66 lb), gold coconut shells studded with rubies and emeralds, and several 18th century Napoleonic era coins were found amongst many other objects. In early 2012, an expert committee had been appointed to investigate these objects, which include lakhs of golden coins of the Roman Empire, that were found in Kottayam, in Kannur District. According to Vinod Rai, the former Comptroller-and-Auditor-General(CAG) of India, who had audited some of the Temple records from 1990, in August 2014, in the already opened vault A, there is an 800 kg (1,800 lb) hoard of gold coins dating to around 200 BCE, each coin priced at over 2.7 crore (US$390,000). Also found was a pure Golden Throne, studded with hundreds of diamonds and other fully precious stones, meant for the 18-foot-long Deity. As per one of the men, who was among those that went inside this Vault A, several of the largest diamonds were as large as a full-grown man's thumb. According to varying reports, at least three, if not more, of solid gold crowns have been found, studded with diamonds and other precious stones. Some other media reports also mention hundreds of pure gold chairs, thousands of gold pots and jars, among the articles recovered from Vault A and its antechambers.
This revelation has solidified the status of the Padmanabhaswamy Temple as the wealthiest place of worship in the world. It is conservatively estimated that the value of the monumental items is close to 1.2 lakh crore or 1.2 trillion (US$17 billion). If the antique and cultural value were taken into account these assets could be worth ten times the current market price.