The First Church of Christ, Scientist is the administrative headquarters and mother church of the Church of Christ, Scientist, also known as the Christian Science church. Christian Science was founded in the 19th century in Lynn, Massachusetts, by Mary Baker Eddy with the publication of her book Science and Health (1875).The First Church of Christ, Scientist, is located in the 14.5-acre Christian Science Center in Boston, Massachusetts. The center is owned by the church and contains the Original Mother Church (1894); Mother Church Extension (1906); Christian Science Publishing House (1934), which houses the Mary Baker Eddy Library; Reflection Hall (1971); Administration Building (1972); and Colonnade Building (1972). There is also a reflecting pool and fountain.In accordance with the Manual of The Mother Church, the Mother Church is the only Christian Science church to use the definite article ("the") in its title. Branch churches are named "First Church of Christ, Scientist", "Second Church of Christ, Scientist", and so on, followed by the name of the city, in the order in which they were built in that city (for example, Seventeenth Church of Christ, Scientist, Chicago).