Magna Carta exhibition opens at Christ Church in Dublin
Archbishop of Dublin in early 1200s was seminal document’s second named witness
A Royal Mail commemorative stamp from a set marking the 800th anniversary this month of the signing of the Magna Carta in England. Photograph: Royal Mail/PA Wire
One of the most important legal documents in history, the Magna Carta established the principle that everyone, including a monarch, is subject to the law and guaranteed all subjects the right to a free trial.