Camille Polonceau
Jean-Barthélémy Camille Polonceau was a French railway systems engineer. He was born in Chambery, France, and died in the French commune Viry-Chatillon.
In 1839 he invented the Polonceau truss, a method of roof construction considered "one of the most successful roof designs of the nineteenth century".
Polonceau's name is one of the 72 names on the Eiffel Tower.
