Through January 5, 2014 there is a stunning exhibit of printmaking at the National Gallery of Art.  It includes several pieces by John Cage (perhaps better known as a composer).

The first image above is a print - Variations III, No. 14 -  that Cage created at Crown Point Press in 1992.

The second image is my photograph of a large industrial protective screen (canvas, I think) hanging near L'Enfant Plaza in Washington DC.  

The Cage print measures 17½–19¼ x 25¾–26¼ inches.  The original form on which my composition is based was at least twenty-five feet high.  I'm not sure of the space captured in my photograph, security fence kept me at a distance.