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word of the week: PENDENTIVE

2010 February 14
by Caroline Nye Stevens

Pendentive at the Chicago Cultural Center

PENDENTIVE: A curved triangle forming the transition from the circular plan of a dome to the polygonal plan of its supporting structure.

Here is a pendentive at the Chicago Cultural Center, which was originally the Chicago Public Library. ¬†Click on the image to enlarge it. ¬†Notice the letters “CPL” (Chicago Public Library) around a “Y” shape symbolic of the branches of the Chicago River.

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