Alexandre Théodore Brongniart (1739-1813). "Projet pour le cimetière de l'Est dit Mont-Louis ou Père Lachaise, vers 1810… https://www.rawpixel.com/image/7726282/image-art-public-domain-mapFree Image from public domain licenseAlexandre Théodore Brongniart (1739-1813). Plan du cimetière du Père Lachaise. Aquarelle et encre noire sur papier cartonné… https://www.rawpixel.com/image/7725971/image-art-public-domain-creative-commonsFree Image from public domain licenseThe tombstone of François Vincent Raspail at Père Lachaise cemetery, Paris. Photograph by F. Kempter, 1878. https://www.rawpixel.com/image/13963526/photo-image-plant-person-treeFree Image from public domain licenseAbelard and Heloise: monument in Père Lachaise cemetery, Paris. Aquatint after Gaucherel. https://www.rawpixel.com/image/13999417/image-cartoon-plant-personFree Image from public domain license