French public exhibitions and chain-gangs ended only in the 1830s-40s

Evidence

The public exhibition of prisoners was maintained in France in 1831, despite violent criticism – ‘a disgusting scene’, said Réal (cf. Bibliography); it was finally abolished in April 1848. While the chain-gang, which had dragged convicts across the whole of France, as far as Brest and Toulon, was replaced in 1837 by inconspicuous black-painted cell-carts. — Michel Foucault, Discipline & Punish- The Birth of the…, 44