Hôtel de Ville ruins: a stair to a lower level
The ruins photo shows a grand stair descending through an arch into a lower level under balustrades and columns.
The questionHow deep do these buildings go, and what is down there?
Investigate
Ruines de la Commune de Paris, 1871. L'escalier d'honneur, Hôtel de Ville, 4ème arrondissement, Paris. PH4389
1 clue in this photo
Photo: Andrieu, Jean (Montaigu-de-Quercy, 17–07–1816 - vers 1872 — 1876), photographe · CC0 · via Wikimedia Commons