If you are interested in the above subject Google Wikipedia: Goan Catholics, below is an excerpt. Main article: History of Goan Catholics Pre-Portuguese era [ edit ] It was believed until recently that there was no concrete evidence that Christianity prevailed in Goa before the Portuguese arrived, but it was believed that St. Bartholomew , one of the twelve Apostles of Jesus Christ, brought the Gospel and spread it in Konkan , including Goa, just as St. Thomas had done in Kerala and Tamil Nadu , in Southern India . [23] However, the work of the historian Jose Cosme Costa, Apostolic Christianity in Goa and in the West Coast (Pilar, Goa: Xavierian Publication Society, 2009), makes a case for the existence of Christianity in Goa before the arrival of the Portuguese. He speaks of Goa as a trading centre with the Middle East and with Rome). He suggests that the Apostle Thomas might have made his way over land from northern India to Kerala. He also examines the evidence of the ...