Eugène Viollet-Le-Duc (French architect, 1814-1879) by Nadar (Gaspard Félix Tournachon) https://www.rawpixel.com/image/8965872/image-person-man-parisFree Image from public domain licenseSouth side of Notre-Dame, Paris, during restoration by Hippolyte Bayard https://www.rawpixel.com/image/14312933/south-side-notre-dame-paris-during-restoration-hippolyte-bayardFree Image from public domain license