The Mapparium's 1935 stained-glass globe and acoustics

The Mapparium at the Mary Baker Eddy Library is a three-story, walk-through stained-glass globe constructed in 1935 that displays the world as it was cartographically represented in the mid-1930s. The original glass panels were preserved, so the political boundaries reflect that historical period rather than current borders. The spherical interior produces distinctive acoustics that allow a whisper at one point to be heard clearly across the globe, a phenomenon demonstrated during tours. The Mapparium is a frequently noted local cultural attraction and research subject for its combination of art, history, and acoustics.