Civilization 6's Religious Victory is an all-new win condition in the Civ series, but thanks to some smart, simple implementation, feels like it's been here the whole time.
Religion functions in largely the same way as previous Civ games - cities and units can exert pressure to convert others nearby, and many Beliefs are shared by all who follow that Religion, rather than just the founding Civ. However, the Religious Victory condition is of course completely novel, and as such we'll be explaining how to spread the holy word far and wide, below.
Before doing so however, a quick reminder of our Scientific Victory and Military Domination Victory guides, too - because there's no point in mastering Religion only to be pipped by a Space Race or suprise nuke that you could have seen coming!