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			Top of the CONA Hierarchy
			.... Built Works (CONA facet)
			........ <B> (8)

			............ Built Works by class: fortifications, transportation, bridges, barriers, military, urban planning, and engineering works
			................ Les Propylées de Paris
			.................... Barriere de la Villette
			.................... Barriere de l'Etoile
			.................... Barriere de Monceau
			.................... Barriere des Bonshommes
			.................... Barriere du Trône

........ <U> (1)