The southern side of Montmartre and Sacré-Cœur seen from the 9th arrondissement. This skyline is filled with iconic Parisian rooftops made of zinc and covered with forests of clay chimney pots. Baron Georges Eugène Haussmann, «préfet de la Seine» from 1848, strongly encouraged the use of zinc for roofs on new construction in his building codes because the metal is lighter than slate and lead and less expensive than copper. Furthermore, it is easy to maintain and resistant to corrosion, making it ideal for the occasionally extreme weather in Paris. There’s an Easter egg in here: one single person visible in this entire photograph, a man reclining on a rooftop, above and to the left of the center of the picture; hover over this photo with your mouse to find him.