Henry III (1 October 1207 – 16 November 1272) was crowned King of England in 1216, despite being less than ten years of age. Although not widely-known, he reigned for 56 years until his death in 1272.
After his father John’s death in 1216, Henry, who was aged nine at the time, was hastily crowned in Gloucester; he was the first child monarch since the Norman invasion of England in 1066.
Under John's rule, the barons were supporting an invasion by Prince Louis of France because they disliked the way that John had ruled the country. However, they quickly saw that the young prince was a safer option. Henry's regents immediately declared their intention to rule by the Magna Carta, which they proceeded to do during Henry’s minority. The Magna Carta was reissued in 1217 as a sign of goodwill to the barons and the country was ruled by regents until 1227.