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Paris' 1859 'Fermiers Généraux' tax-wall limits (blue); Paris' 'Thiers' fortifications that would become its new limits from 1860 (red); The first sections of the 'Petite Ceinture' railway that ran between the two from 1848-52 (green and orange)
Le tracé de l'ancien mur des Fermiers généraux est en bleu.