Sthanu Ravi Varma: The Chera Perumal King Who Made Kerala a Port, Temple and Knowledge Power
The most famous document of his reign is the Tharisapalli copper plate grant, also known as the Quilon Syrian Christian copper plates. This record is dated to the fifth regnal year of Sthanu Ravi, around 849–850 CE, and is one of the most important early medieval documents in Kerala history. It was issued at Kollam by Ayyan Adikal Thiruvadikal, the Venad chieftain under Chera authority, in favour of Mar Sapir Iso, a Christian merchant-leader connected with the establishment of a church and trading settlement at Kollam.