The Treaty of Constantinople signed on 21 July 1832 and was the product of the London Conference of 1832 which opened in February 1832 with the participation of the Great Powers on the one hand and the Ottoman Empire on the other. On 21 July 1832 British ambassador Sir Stratford Canning and the other representatives concluded the Treaty of Constantinople, which set the boundaries of the new Kingdom of Greece along the Arta–Volos line.