Spices, pearls, diamonds, and silk were exported to Egypt and Rome from these ports.Pearls and diamonds came to the Chera Kingdom from Ceylon and the southeastern coast of India, then known as the Pandyan Kingdom.Likewise at Male, where the pepper grows, and in the farming community of Kalliana (Kalliankal at Nillackal) there is also a bishop consecrated in Persia in accordance with the Nicea sunnahadose of 325 AD." The port at Kollam, then known as Quilon, was founded in 825 by the Nestorian Christians Mar Sabor and Mar Proth with sanction from Ayyanadikal Thiruvadikal, the king of the independent Venad or State of Quilon, a feudatory under the Chera kingdom.
Kollam is an ancient trading town – trading with Romans, Chinese, Arabs and other Orientals – mentioned in historical citations dating back to Biblical times and the reign of Solomon, connecting with Red Sea ports of the Arabian Sea (supported by a find of ancient Roman coins).
There was also internal trade through the Punalur Pass connecting the ancient town to Tamil Nadu.
The Tharisapalli plates presented to Maruvan Sapor Iso by Ayyanadikal Thiruvadikal granted the Christians the privilege of overseeing foreign trade in the city as well as control over its weights and measures in a move designed to increase Quilon's trade and wealth.
The two Christians were also instrumental in founding Christian churches with Syrian liturgy along the Malabar coast, distinct from the ancient Vedic Shivism propounded by Adi Shankara in the early 9th century among the Nampoothiri Vaishnavites and Nair Sub Castes, as Malayalam was not accepted as a liturgical language until the early 18th century.
3rd century BC–12th century), and later became the capital of the independent Venad or Kingdom of Quilon on its foundation in c. Kollam was considered one of the four early entrepots in global sea trade during the 13th century, along with Alexandria and Cairo in Egypt, the Chinese city of Quanzhou, and Malacca in the Malaysian archipelago Along with Pattanam (Muziris), Quilon was an ancient seaport on the Malabar Coast of India from the early centuries before the Christian era.
The city had a high commercial reputation from the days of the Phoenicians and Ancient Romans.Other important towns in the city suburbs are Eravipuram, Kottiyam, Kannanallur and Chavara.Kollam appeared as Palombe in Mandeville's Travels, where he claimed it contained a Fountain of Youth.The proportion of females to males in Kollam city is second highest among the 500 most populous cities in India.Four major trading centers/towns around Kollam are Kottarakara, Punalur, Paravur and Karunagapally.Marco Polo, the Venetian traveller, who was in Chinese service under Kublai Khan in 1275, visited Kollam and other towns on the west coast, in his capacity as a Chinese mandarin. Nagam Aiya in his Travancore State Manual records that in 822 AD two East Syrian bishops Mar Sabor and Mar Proth, settled in Quilon with their followers.