by
Flickr User: Canopic published on 12 March 2014
The famous stone from an Incawall in Cuzco, Peru. The stone has 12 angles and illustrates the great precision Inca masons employed in ensuring their stone blocks fitted so well together that no mortar was needed. (15th century CE).
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Original image by Flickr User: Canopic. Uploaded by Mark Cartwright, published on 12 March 2014 under the following license: Creative Commons: Attribution-NonCommercial-NoDerivs. This licence only allows others to download this content and share it with others as long as the author is credited, but they can't change the content in any way or use it commercially. Please note that content linked from this page may have different licensing terms.