Mapparium at the Mary Baker Eddy Library

The Mapparium is a three-story stained-glass globe constructed in 1935 and housed in the Mary Baker Eddy Library on Boston's Christian Science Plaza. Visitors view a 1934-era world map rendered in glass from a glass walkway through the globe's center, making it a distinctive historic-cartography attraction. The structure is also noted for acoustic effects that allow sounds to carry unusually across the interior of the globe.