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This video is a demonstration of the use of what are called "consonant inequalities" in Renaissance Design, combined with the use of the square root of two.  This combination is a common one, seen in Renaissance architecture and also in the design of the violin . 

This window drawing by Michelangelo shares the same basic structure as the framework used to draw Cremonese sound holes. 

This is a companion video to the article "Universal Harmony",  published in the Strad Magazine in January 2019.  

A short demonstration of my method for drawing a basic Cremonese volute, compared to a fossil ammonite.  This illustrates the simplicity and beauty of classic Cremonese violin design