Gilbert de Clare, 1st Earl of Gloucester was a prominent English nobleman born around 1180. He was the son of Richard de Clare, 6th Earl of Hertford and Amice de Clare. Gilbert became the 1st Earl of Gloucester in 1217, playing a significant role in the political landscape of medieval England, particularly during the reign of King Henry III. As a powerful lord, Gilbert was involved in various conflicts, including the First Barons' War. He was known for his military leadership and alliances, which helped shape the power dynamics of the time. Gilbert de Clare died in 1230, leaving a lasting legacy in English history.