John de Lacy was a prominent English nobleman during the 13th century. He served as the Earl of Lincoln and was known for his loyalty to the Plantagenet kings. De Lacy played a significant role in the political landscape of England, particularly during the reign of King John and the subsequent Magna Carta crisis. Born around 1180, de Lacy was a key figure in various military campaigns and held several important estates. His influence extended beyond military matters, as he was involved in the governance of the realm and the management of his lands, contributing to the development of medieval England.