Mont Blanc is controversial between the countries:

Mont Blanc is controversial between the countries:

Explanation

Since the Italian Republic was formed 150 years ago, France has claimed that three of the principal peaks on the Mont Blanc massif, Dôme du Goûter, Punta Helbronner and the tallest, Mont Blanc itself at 4,810m (15,781ft), are in its territory. This has always been disputed by Italian mountaineers