Paris in 1859 - its Fortifications, Chemin de fer de (Petite) Ceinture (Paris-Auteuil, Chemin de fer de Ceinture Rive Droite).
J.M. Schomburg, aka <a href="//commons.wikimedia.org/wiki/User:ThePromenader" title="User:ThePromenader">ThePromenader</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>