This research work enumerates the contributions made to Christianity in Tamilnadu, India, by C.J. Beschi (1680-1747), popularly known as Veeramamunivar, an illustrious Jesuit of the Madurai mission. This work attempts to portray Beschis contribution as an itinerant missionary, as a man of literary works and as a theologian. This book presents Beschi as a tireless missionary among the subalterns and as one of the key founders of Christianity in Tamilnadu. It highlights Beschis acquired proficiency in Tamil language leading him to become one of the pioneers of Tamil theology; He expresses the Christian faith effectively and creatively drawing inspirations from Tamil literary sources. Thus, he reaches out to both the literates and illiterates. Till now we do not have any book on Beschis theological contributions rooted in the cultural and religious traditions. This book would certainly be an inspiration to all Christians to fulfil their call to evangelize and to rediscover the efficacy of Christian mission.