Vosges square is surrounded by several hôtels particuliers (private mansions/townhouses), such as the Hôtel de Sully, built between 1625 and 1630. . Hôtel de Sully. Hôtel de Sully. Staircase. Below a flight of stairs. . Bibliothèque HistoriqueNotre-Dame-des-Blancs-Manteaux Labels