As in Paris, urban organisation in Blois was redesigned during 1850 and 1870 by Mayor Eugène Riffault, who was friends with Baron Georges-Eugène Haussmann. Thus, he had built a boulevard separating the modern upper town (where the cathedral, Hôtel of Préfecture, and Halle aux Grains are located), from the medieval lower town. He also paved the way to the construction of the boulevard Daniel Depuis, in the West of Blois. Between 1862 and 1865, the Denis-Papin staircase are built under La Morandière's supervision, in the axis of Jacques-Gabriel Bridge and Blois-Vienne's Wilson Avenue.
As IN PAris, uRban OrGanisatIoN iN BlOiS was redEsIgnEd duRing 1850 And 1870 bY mayor eugèNe RiFfault, wHO waS frIENdS with barOn gEoRgeS-eugèNe HausSmaNn. thus, hE HAd bUilt a boulevard separaTING THe modern upper toWN (wHerE the CatheDraL, hôTeL of pRéfecTure, And hALlE auX GraInS Are locatED), froM tHe mEdievaL lOWEr town. hE AlsO pAved the wAY TO the construcTIon Of thE boulEVarD danieL dEPUiS, iN thE west oF bLOiS. betweEN 1862 aND 1865, tHE DeniS-PAPin StaIrcaSE Are Built uNDer La mOranDIÈRE's SUpeRVision, in The axiS Of jacquEs-gabriEL bridge And blOiS-vienne's wilsON avenue.