The 1915 Armenian Genocide in Ottoman Turkey, the Holocaust, genocides in Rwanda and Cambodia are among the 20-th century genocides. The participants of the international forum taking place in Saint Lorenso Spanish city the other day came to such a determination. Experts from Europe, the USA, Latin America as well as students and teaching staff of the Spanish Universities participated in the forum. Zorian genocide institute head, Professor Vahagn Dadrian gave a lecture on the Armenian Genocide at the beginning of 20-th century. All the people giving lectures had the same opinion on inadmissibility and fatal consequences of impunity of crimes committed against the humanity.