The mathematician Jean-victor Poncelet died at the age of 79. Here is all you want to know, and more!
Biography - A Short Wiki
Brilliant mathematician and engineer known for his work in projective geometry as well as his hand in the development of useful inventions such as the water wheel. He served as the Commandant General of Ecole Polytechnique, where he also studied.
His father was lawyer Claude Poncelet.