![](http://www.alamy.com/thumbs/6/2B5EF1F7-F4AB-4124-9FD7-DA7B3B8BE7B2/BJN9WF.jpg)
technics, perpetuum mobile, perpetual motion machine by Villard de Honnecourt, circa 1230,
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Keywords: 13th, ages, century, feldhaus, historic, historical, honnecourt, machine, medieval, middle, mobile, motion, perpetual, perpetuum, technics, villard