https://en.wikipedia.org/wiki/Declaration_of_Arbroath
The Declaration of Arbroath (Scots: Declaration o Aiberbrothock; Latin: Declaratio Arbroathis; Scottish Gaelic: Tiomnadh Bhruis) is a declaration of Scottish independence, made in 1320. It is in the form of a letter in Latin submitted to Pope John XXII, dated 6 April 1320, intended to confirm Scotland’s status as an independent, sovereign state and defending Scotland’s right to use military action when unjustly attacked.
Generally believed to have been written in the Arbroath Abbey by Bernard of Kilwinning, then Chancellor of Scotland and Abbot of Arbroath,[1] and sealed by fifty-one magnates and nobles, the letter is the sole survivor of three created at the time. The others were a letter from the King of Scots, Robert I, and a letter from four Scottish bishops which all made similar points.
