1829
On 22 March 1829, a conference of ambassadors of the three protecting powers (Britain, France and Russia) established the borders of Greece, which was to encompass all lands south of the line running from the Ambracian Gulf to the Pagasetic Gulf, including Negroponte (Euboea) and the Cyclades but not Crete. Greece was, however, to remain an autonomous tributary state under a prince that would explicitly not belong to the ruling families of the three powers. A further conference in London on 30 November of the same year decided that Greece should instead be given full independence, but its borders were moved back to the Aspropotamos River-Maliac Gulf line.
Read more about this topic: London Protocol