Pei & Partners (Araldo Cossutta and I. M. Pei, design partners), the 13.5-acre (55,000 m2) Christian Science Plaza along Huntington Avenue includes a large administration building, a colonnade, a reflecting pool and fountain, and Reflection Hall (the former Sunday School building).

[9] The Mary Baker Eddy Library is housed on the site in an 11-story structure originally built for the Christian Science Publishing Society.

Constructed between 1932 and 1934, the neoclassical-style building with its Mapparium, a walk-through inside-out globe of the world in 1934, has become an historic landmark in Boston's Back Bay.

Restoration of the library's 81,000-square foot portion of the building began in 1998, and the final renovation and additional construction were completed in 2002.

[n 1] Carol Norton, a student of Eddy's, and a practitioner and teacher of Christian Science, described the relationship between the First Church of Christ, Scientist and its branch churches as similar to the relationship between the federal government of the United States and the individual states.