"Jacques Ignace Hittorff or, in German, Jakob Ignaz Hittorff (German: [ˈjaːkop ˈɪɡnaːts ˈhɪtɔʁf], French: [ʒak iɲas itɔʁf]) (Cologne, 20 August 1792 – 25 March 1867) was a German-born ...
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French architect who combined advanced structural use of new materials, notably cast iron, with conservative Beaux-Arts classicism in a career that spanned the decades from the Restoration to the Second Empire." - (en.wikipedia.org 16.11.2019)