At the scale of the Mont Blanc massif, the border between Italy and France passes along most of the main Alpine watershed, from the Aiguille des Glaciers to Mont Dolent. However, its precise location near the summits of Mont Blanc and nearby Dôme du Goûter is disputed since the 18th century. Italian officials claim the border follows the watershed, splitting both summits between Italy and France, while French officials claim the border avoids the two summits, making both of them in France only. The size of these two (distinct) disputed areas is approximately 65 ha on Mont Blanc and 10 ha on Dôme du Goûter.