The East Indians, also called East Indian Catholics or Bombay East Indians, are an ethno-religious Indian Christian community native to the Seven Islands of Bombay and the neighbouring Mumbai Metropolitan Area of the Konkan division.
A Dominican missionary by the name Jordanus Catalani, who was either Catalan or Occitan (southern French), began evangelising the locals in Sopara, Thana & Kalyan-Dombivli towns of north Konkan in around 1323 AD. Sopara was an ancient port and an international trading center.
History of Bombay under Portuguese rule (1534–1661)
After ushering in the Age of Discovery, Portuguese Armadas under the command of Vasco Da Gama found their way to India in 1498 via the Cape Route. In the next few years they acquired many colonial possessions in what would become the Portuguese East Indies; their main aims were to capitalise on the spice trade and promotion of Christian missions to convert indigenous peoples, for which the Primate of the East Indies was founded. Although Brahmins and other high-caste Hindus were ceremoniously converted by the Portuguese Church, and were treated with favour and distinction, most of them continued to engage in agriculture, fishing, and other rural occupations handed down by their ancestors, and received neither secular nor religious education. Among the converts were a number of descendants of the Ancient Indian Christian community reportedly founded by Bartholomew the Apostle. They coalesced into a community under Portuguese rule known as Norteiros and later as "Portuguese Christians" or "Bombay Portuguese" in British Bombay.
The Franciscans spearheaded the evangelisation of the "Province of the North" (Província do Norte) headquartered at Fort San Sebastian of Bassein, but the fort's officials were subordinate to the viceroy in the capital of Velha Goa. From 1534 to 1552, a priest by the name António do Porto converted over 10,000 people, built a dozen churches, convents, and a number of orphanages hospitals and seminaries.