The Welshman who wrote modern Wales six hundred years before it existed.
On 16 September 1400, a Welsh lord called Owain Glyndŵr raised his banner at Glyndyfrdwy and declared himself Prince of Wales. The Welsh came to him from every valley. By 1404 most of Wales answered to Owain, and he summoned a Welsh parliament at Machynlleth, the first in the country's history.
Two years later, on 31 March 1406, at Pennal in Merionethshire, he sealed a letter to the King of France setting out what Wales would be. The rising was crushed by 1412. His wife Margaret, his daughter Catrin, and his grandchildren died in the Tower of London. Owain vanished into the mountains and was never seen again.
But the letter survived. Every word he wrote in 1406 has now come true. It took over six centuries. He didn't fail. He kept the vision alive for the future of Wales.
If you were writing down what these islands should be in 600 years, what would you put in your letter?