In my medieval fantasy world, Christianity, or at least it's parallel universe equivalent, is the most dominant religion. However, later in my world, pagan beliefs start to become popular again and even take over as the main religion. For realism, how could pagan religions make a comeback?
Some things to note about my world:
- Magic is used widespread.
- One king converted back to paganism after a witch used magic to save him.
- I know how monotheistic religions like Christianity get followers, and due to this, Christianity is still popular, just not the number 1 religion.
- Some of the "pagan" religions are just monotheistic churches who worship 1 pagan God.
- There are some reforms for the pagan religions.
- The year it begins is between the late 1200's and early 1300's, during the crusades.
- Their equivalent to Islam has the same status as Christianity
In total, I would like to know what would make religions that are pagan replace the big, organized, monotheistic religion like Christianity.