On 15th June 1215 the Magna Carta was sealed under oath by King John at Runnymede, on the bank of the River Thames near Windsor, England. 2015 is the 800th anniversary of this charter, which led eventually to the rule of constitutional law in England and beyond. This book of essays on various aspects of the Charter was written by distinguished academics for the Royal Historical Society to commemorate the 700th anniversary of Magna Carta. N. B. The readers in this project are not scholars of mediaeval Latin or French. Where there are passages or phrases of Latin and Old French, we have endeavoured to make them clear, but make no claim to authentic pronunciation. [chương_files]