Wait, there is another very interesting thing I’d like to share, this is what clinched it for me.
It was another universal belief that Mary had no other children, only Jesus.
Universal for over over 1600 years and near universal up 1900 years, just about all Protestant denominations held to Mary only being Mother to Jesus.
Of all the universal beliefs held in Christianity, this one was one of the most consistent, and across the board, even post reformation 400 years into Protestantism.
Universality has a quality of its own, but near universality for an extra 400 years into Protestantism, was extraordinary to find out.