Marc René, marquis de Montalembert
Marc René , marquis de Montalembert ( 16 July 1714 – 29 March 1800 ) was a French military engineer and writer , known for his work on fortifications . 
<triplet> Marc René, marquis de Montalembert <subj> 16 July 1714 <obj> date of birth <subj> 29 March 1800 <obj> date of death