King Henry III of England

King Henry III of England reigned from 1216 to 1272, making him one of the longest-serving monarchs of the medieval period. He ascended to the throne at just nine years old, following the death of his father, King John. His reign experienced significant challenges, including conflicts with barons and a struggle for power, which led to the First Barons' War. Notably, Henry promoted the construction of Westminster Abbey. His rule is characterized by an evolution towards parliamentary governance. Despite his aspirations for a strong monarchy, his reign was marked by political fragmentation and unrest, influencing England's future governance.