High political tensions between France, Italy spill over in cultural question of Da Vinci commemoration

Da Vinci died 500 years ago today. The painter and inventor was born in Tuscany but spent final years in France. The presidents of France and Italy visit his grave today to mark this anniversary. The Louvre will hold a special exposition on Da Vinci's work later this year. However, high political tensions seem to be spilling over into culture.