![](http://www.alamy.com/thumbs/6/B68D7115-B637-4AFA-862B-1A5AEF1F33C7/2M47A7T.jpg)
Palladio's design for a braced arch. Original caption: From page 500 - "Engineers and Engineering in the Renaissance" by Parsons - Baltimore 1939.
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Photo credit: © NB/PR / Alamy / Afripics
License: Licensed
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