Eugène Emmanuel Viollet-le-Duc (French: [øʒɛn vjɔlɛlədyk]; 27 January 1814 – 17 September 1879) was a French architect and theorist, famous for his interpretive "restorations" of medieval buildings. Born in Paris, he was a major Gothic Revival architect.
His works were largely restorative and few of his independent building designs were ever realised. Strongly contrary to the prevailing Beaux-Arts architectural trend of his time, much of his design work was largely derided by his contemporaries. He was the architect hired to design the internal structure of the Statue of Liberty, but died before the project was completed. SOURCE: Wikipedia