On April 24, 1965, for the first time for any such demonstration in the entire Soviet Union,[3] 100,000[4][5] protesters held a 24-hour demonstration in front of the Opera House on the 50th anniversary of the commencement of the Armenian Genocide, and demanded that the Soviet Union government officially recognize the Armenian Genocide committed by the Young Turks in the Ottoman Empire, and build a memorial in Armenia's capital city of Yerevan to perpetuate the memory of the victims of the Armenian Genocide.