How is Freemasonry related to Christianity?

My community recently found out that one of our local priests is also a [Freemason](https://en.wikipedia.org/wiki/Freemasonry) . I'm not entirely sure of what Freemasonry is about and how it relates to Christianity. What exactly can outsiders know using publicly available sources about what Freemasonry teaches about the relationship between itself and Christianity? Does it teach that they overlap with, are a subset of, or are unrelated with the Christian faith? Note: Since one of our local priests is one, there must be others who profess Christianity and practice Freemasonry. How do they view the practice in relation to their faith? Where do ultimate allegiances lie for practitioners of both?