Principia College

Principia College (commonly referred to as Principia or Prin) is a private liberal arts college in Elsah, Illinois, United States. A four-year coeducational institution, the college was founded in 1912 by Mary Kimball Morgan, and its stated purpose is "to serve the Cause of Christian Science." According to the college, it has no affiliation with the Church of Christ, Scientist, but "the practice of Christian Science is the cornerstone of campus life." Students and staff are practicing Christian Scientists.

The Principia is an educational institution for Christian Scientists located on two campuses in the St. Louis, Missouri metropolitan area of the United States. Principia School, located in West St. Louis County, serves students from early childhood through high school and Principia College, located about thirty miles away, is on the bluffs overlooking the Mississippi River in Elsah, Illinois.