On 17 December 1912, ambassadors of the six great powers (Great Britain, France, Germany, Austria-Hungary, Russia and Italy) met in London for the opening day of a conference to discuss the Balkan crisis. The meeting was chaired by British foreign secretary Sir Edward Grey. Officially it was described as the "Reunion of the Ambassadors of the Six Great Powers, Signatories of the Treaty of Berlin." More often, it is just called "the Ambassadors' Conference."
In parallel with the Anbassadors' Conference, a conference of representatives of the Balkans belligerents had convened in London the previous day.