Change the Course of Florentine History .   ^ The Leonardo Bridge Project ^ Levy, Daniel S. (October 4, 1999). "Dream of the Master" . Time magazine. Archived from the original on 2007-09-12 . http://web.archive.org/web/20070912033510/http://www.vebjorn-sand.com/dreamsofthemaster.html . Retrieved 2007-09-27 .   ^ Leonardo's Dream Machines ^ see reference to this in section