Few people know about him. Including me, until Google use his name as logo. Eugène Emmanuel Viollet-le-Duc, he was born in 27 January 1814 in Paris. He was a French architect and theorist, famous for his interpretive “restorations” of medieval buildings. He was a major Gothic Revival architect.
Wikipedia wrote, 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.