| Pearl Temple | |
| Former Name: | Castle of Seven Treasures |
| Location: | Stalagmite Street, Yizhou City, Yizhou (modern-day Sichuan) |
| Country: | Tang dynasty (618–907) |
| Denomination: | Church of the East |
| Founded Date: | No later than 756 AD |
| Founder: | East Syriac missionaries |
| Demolished Date: | During the Tang dynasty |
| Status: | Church |
| Functional Status: | Destroyed |
Pearl Temple was a Church of the East church in Yizhou City (modern-day Chengdu) built no later than 756 AD on the ruins of the ancient Shu-era Castle of Seven Treasures (Pearl Castle). It was located on Stalagmite Street outside the west gate of the city. According to the Illustrated Chorography of Shu, the church was destroyed on an unspecified date during the chaos caused by a military conflict in the Tang dynasty (618–907).
Little is known about the appearances of the castle and the church, except that they were both decorated with pearls. According to the 4th-century gazetteer Chronicles of the Southern Lands by Chang Qu: "The Castle of Seven Treasures was built by ancient Shu kings of the Kaiming dynasty (666 BC – 316 BC) with curtains made of pearls. It was burned down, together with thousands of houses, by the Great Fire of during the reign of Emperor Wu of Han (141 BC – 87 BC). Nowadays, people often find pearls in the castle's ruins."
A description of Pearl Temple found in 's Stories of Shu Commandery (11th century) reads as follows: "The 'stalagmites' outside the west gate of the city are said to be the foundation of Pearl Castle, on whose ruins a (i.e., an East Syriac church) was built by "Hu" missionaries. The temple consisted of halls and towers totaling 10 spaces. Its doors and windows were decorated with curtains made of gold, pearls and green jasper (or jadeite beads). It was later destroyed and fell to the ground, but the foundation remained. Pearls, gold and green gems were often found in the ruins after heavy rains. The stones known today as 'stalagmites' are not the foundation but [a pair of [[dolmen]]s] situated next to the temple. The Daqin empire, whence a variety of precious stones is obtained, namely, lapis lazuli, emeralds, pearls, and luminous jade. Its waterways lead to Yi Prefecture and, wherefore the temple was built by people from Daqin."
The Illustrated Chorography of Shu also states that the halls and towers of the temple "were decorated with gold and pearls," and calls it "an enchanting edifice of its time," but "it was later abandoned and destroyed during the chaos caused by a military conflict."
The above-mentioned accounts are repeated as a single history in volume 18 of the 12th-century biji collection Loose Records from the Studio of Possible Change by, and in volume 2 of by (1575–1646). The history of Pearl Temple is also recounted in volume 7 of , for the ruins of the church are the subject of Du Gongbu's poem "The Stone Shoots: A Ballad": "Have you not seen by the west gate of Yizhou City, by a field lane the 'Stone Shoots,' a pair crouching high. Since ancient times it's been said that these were 'eyes of the sea,' mosses and lichens have eaten away all traces of waves and billows. In heavy rains one often finds rare green gems—these things are a muddle and hard to explain clearly." He was unaware of the site being the ruins of a church, for he went on to write: "I suspect that in olden days these were tombs of a minister or grandee, they set the stones up as markers, and they still survive today."
In light of the fact that Pearl Temple had already been destroyed when "The Stone Shoots: A Ballad" was being written by Du Gongbu, who stayed in Yizhou during the reigns of the emperors Suzong and Daizong (756–779), speculated that the construction of the temple was no later than the Xuanzong period (712–756).
The so-called "stalagmites" were interpreted as a pair of dolmens or menhirs located outside the west gate of Yizhou City, which are no longer extant. Accodring to Chang Qu's Chronicles of the Southern Lands, they were erected by five legendary warriors and served as tomb markers for the kings of Ancient Shu. They were also said to be the foundation of the Castle of Seven Treasures and subsequently of Pearl Temple, but this idea was rejected by Zhao Bian as stated in his Stories of Shu Commandery.
According to Chen Shou's (3rd century), apart from "stalagmites", these stones were also given names such as "eyes of the western sea", "sacred altar of ", "stone gate of the five warriors", "stone rhinoceroses", and "towers of the imperial consort of Shu".
After traveling to Chengdu in the 12th century, Lu You wrote in his : "The 'stalagmites' in Chengdu are not similar in shape to bamboo shoots, but are made of stacked stones. The assertion of the existence of the so-called 'eyes of the sea' is verifiable. Green gems are still to be found today."
Lin Ganqiu of Chengdu Daily was inclined to believe that these standing stones were not the foundation, but situated next to the castle and later the church.