Following the reformation, there were obviously huge movements in the denominational beliefs in Europe, with major chunks turning to Lutheranism, Anglicanism and Calvinism. Subsequently, with the counter-reformation, some nations changed back. But all this seemed to come to a very sudden end by 1700, even though the Enlightenment ploughed on.
Your challenge is to get major religious changes to Christian denominations in Europe after this date. Bonus points if it's to an OTL minor Christian sect or to a new one that could emerge.
Your challenge is to get major religious changes to Christian denominations in Europe after this date. Bonus points if it's to an OTL minor Christian sect or to a new one that could emerge.