With a POD at the founding of the Christian faith, have the majority of the inhabitants of the Indian Subcontinent (OTL India, Pakistan, Nepal, Bhutan, Bangladesh, Sri Lanka and The Maldives) following a branch of Christianity, whether it be Catholic, Orthodox, Protestant, Nestorian or some other Christian branch, whether it be from OTL or an entirely different variety. Maybe the native Indian sect of the Saint Thomas Christians from Southern India becomes more successful and starts spreading like wildfire, or maybe Persia becomes Christian (a possible thread in its own right) and in turn spreads it to India, much like how Islam spread into the Subcontinent IOTL. How would a Christianized India change the course of history? Would there be some sort of Indian-specific Christian branch that uses Sanskrit as its liturgical language, much like Latin in Catholicism or Greek in Orthodoxy? Assuming Europe still becomes Christian (a big if for something this far back), how would the relationship between Europe and India change? Would there be more contact and trade before OTL's Age of Exploration? There are many more potential questions, but I feel like I should leave it to you guys now.