Principia is a school for Christian Scientists on two campuses in the St. Louis, Missouri, area. Programs for infants through seniors in high school are located in West St. Louis County. Fifty miles away on bluffs overlooking the Mississippi River at Elsah, Illinois, is Principia College.

Principia is an independent educational institution staffed by Christian Scientists, serving Christian Scientists from infants through adults.
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"The Unfoldment of Character," excerpts from Education at The Principia by Mary Kimball Morgan, describes Principia's educational philosophy.
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What are the intended results of a Principia education?
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This purpose and 23 related policies provide both the foundation and structure for everything that happens at Principia.
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Locate both campuses, and how to go from one to the other.
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Learn about how Principia came to be, and see a timeline with pictures covering the first 100 years of Principia's history.
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The Archives Department collects, preserves, and protects the historical record of The Principia. Inquiries and donations are welcome.
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