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The Mary Baker Eddy Library
200 Massachusetts Avenue
Boston, MA 02115

The Mary Baker Eddy Library provides public access and context to original materials and educational experiences about Mary Baker Eddy’s life, ideas, and achievements.

The Mary Baker Eddy Library provides public access and context to original materials and educational experiences about Mary Baker Eddy’s life, ideas, and achievements, including her Church. The Library promotes exploration and scholarship through its collections, exhibits, and programs.

The Library also houses the Mapparium.

Since 1935, more than 10 million people have traversed the thirty-foot glass bridge that spans the Mapparium, taking visitors to a unique spot: the middle of the world.

This world-famous, three-story, painted-glass globe is one of the key attractions at the Library. The Mapparium’s three-dimensional perspective of the world of 1935 is enhanced by A World of Ideas, an original presentation that features a rich orchestration of words, music, and LED lights to illustrate how ideas have traversed time and geography and changed the world.

On view is our complementary exhibit, "The Mapparium: An Inside View," featuring never-before-made-public letters, documents, and artifacts showcasing the construction, history, and significance of this magnificent architectural and artistic achievement.

Explore how the 1935 world map inside the Mapparium, which has never been updated, serves as a remarkable snapshot of both geographic and global history. Discover major changes in the world since 1935 such as Africa’s movement from colonial rule to independence and learn more about how global change happens.

From the North: Take I-93 South to Exit 26 (Storrow Dr/North Station). Keep left, merge onto Storrow Dr., then take slight left onto Embankment Rd (MA-28). Turn right on Beacon St. At 2nd light, turn left on Clarendon St. At 5th light, turn right on St. James Ave. Stay on St. James Ave to merge onto Huntington Ave. Christian Science Plaza is 0.2 mile on the right. Turn right at the light at Mass Ave, and Library will be on right.
From the South: Take I-93 North to Exit 16 (Southampton St) toward Andrew Square. Turn left on Southampton St. Go straight onto Massachusetts Ave. Go about 1 mile on Mass Ave. Cross Huntington Ave and you will see Symphony Hall on left and Horticultural Hall on right. Library will be on your right.
From the West: Take Massachusetts Turnpike (I-90) East to the Pru Center/Copley Square exit. Keep left at the fork in the ramp to Pru. Merge onto Huntington Ave. Christian Science Plaza will be on right. Turn right at light at Mass Ave; Library will be on right.

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Open Tuesday - Sunday, 10am - 4pm

$6 adults; $4 seniors, students, youth (6-10), military

Public Transportation:
Green Line to:
Pru: Exit station via Huntington Ave, cross street and cross the plaza. At the end of the Reflecting Pool, take a right and follow to end of building.
Symphony: Exit station onto Mass Ave.; Library is on this block.
Hynes: Exit station and turn left onto Mass Ave. Library is four blocks down on corner of Clearway Street.
By Bus: Harvard-Dudley No. 1 stops in front of Library. The CT1 stops at Horticultural/Symphony Hall on Mass. Ave.