John, also known as John Lackland, was born on 24 December 1166 and was King of England from 6 April 1199 until his death in 1216. John, the youngest of five sons of King Henry II, was at first not expected to inherit significant lands. Following the failed rebellion of his elder brothers between 1173 and 1174, John became Henry's favourite child. He was appointed the Lord of Ireland in 1177 and given lands in England and on the continent. After Richard I died in 1199, John was proclaimed King of England. In September 1216, during the war with the Barons, King John contracted dysentery and later died on 19 October. This baronial revolt led to the sealing of the Magna Carta, a document sometimes considered as an early step in the evolution of the constitution of the United Kingdom.