This bronze sculpture has taken a striking patina and sits on the west side of Hôtel de Ville, what I would call the "back door" of this historical building on Rue de Lobau.

This majestic lion, one of a pair flanking the "back door," was likely sculpted in the 1880s by one of the 230 sculptors engaged to create the bronzes during reconstruction.  The building was almost destroyed by fire in 1871 leaving only the stone shell.

He looks very content and proud to be guarding the doors of Hôtel de Ville.

Hôtel de Ville
Rue de Lobau
75004, Paris