Rocher Rond lies in the foothills of the Alps, straddling the communes of Lus-la-Croix-Haute (in the department of Drôme) and Agnières-en-Dévoluy (in the department of Hautes-Alpes).
This peerage went extinct after the death of his only child Madeleine de Créquy, – it included the town of Poix, the viscountcy of Esquennes, the châtellenie of Agnières, and the lands and lordships of Arnehou, Blangy, Cempuis, Croixrault, Eramecourt, Escantu, Essilières, Frettemolle, Hélincourt, la Rue Notre-Dame, Saint-Clair and Vandricourt.