I just copied this from another website. Wittenberg would not be considered a religious school based on this:
Wittenberg is Lutheran-affiliated, but there is a great deal of diversity in regards to religion. The most represented religions on campus are Lutherans and Catholics. Clubs on campus include Lutheran Student Movement (LSM), Newman Club, Athletes for Christ, Young Life, Jewish Culture Club, and Common Ground, among others
This is just an example. You have to research and see if it’s the right fit.