Of J.Jacottet e A. Bayot from Ada Peyrot, Vittorio Viale, Immagini di Torino nei secoli, Torino 1973
The open space is created by Vittorio Amedeo II in 1715 through the removal of the northern bastion of the city wall. A granitic column hold a statue of the Madonna built in 1835 as a thanksgiving for having preserved the city from a cholera epidemic which spread in Piemonte.
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