Mary Baker Eddy (July 16, 1821 – December 3, 1910) was the founder of Christian Science, a new religious movement in the United States in the latter half of the 19th century.
Eddy wrote the movement's textbook Science and Health with Key to the Scriptures (first published 1875) and founded the Church of Christ, Scientist in 1879. She also founded the Christian Science Publishing Society (1898), which continues to publish a number of periodicals, including The Christian Science Monitor (founded in 1908). She was a student of Phineas P. Quimby and worked with him for a number of years.
Wikipedia, Mary Baker Eddy