The battle of Agincourt in 1415 was immortalised in Shakespeare's Henry V as a miraculous underdog English victory over the French.
So why is france investing millions of euros to upgrade the museum near the battlefield in the village of Azincourt in northern France?
The new centre will tell the story of the battle, the weaponry deployed and life in medieval france – and the museum's director, Christophe Milliot, says it will be a big improvement on the existing exhibition.
Perhaps the most striking change is to the statistics used by the centre about the number of troops at the battle.
When the old museum opened on the site in 2001, its exhibition boards said 9,000 English soldiers fought 30,000 French at Agincourt.
The new centre, expected to open in the autumn, will reduce these figures to 8,500 English and 12,500 French.
It's still an upset, but a long way from Shakespeare's underdog story of Englishmen outnumbered five to one.
Professional armies
Before diehard fans of Henry V cry foul, Mr Milliot says the numbers were agreed in…