London Protocol
On 21 July 1832, British Ambassador to the Sublime Porte Sir Stratford Canning and the other representatives of the Great Powers signed the Treaty of Constantinople, which defined the boundaries of the new Greek Kingdom at the Arta–Volos line. The borders of the kingdom were reiterated in the London Protocol of 30 August 1832, also signed by the Great Powers, which ratified the terms of the Constantinople arrangement.