Gabriele Nissim is an Italian journalist, historian and essayist. He is the Chairman of the Gardens of the Righteous Worldwide Committee (GARIWO), that honors the Righteous of all genocides the world over. He is the author or co-author of Invisible Jews: Eastern European Holocaust Survivors from the Communist Era until Today, The Man who Stopped Hitler: The Story of Dimitar Peshev and The Tribunal of Good: The Story of Moshe Bejski. In 1998 the Bulgarian Parliament knighted him for discovering Dimitar Peshev, the savior of the Bulgarian Jews. In 2003 he won the critics' prize "Iliaria Alpi" for the TV documentary Il giudice dei Giusti. He was one of the founders of a museum devoted to Peshev in Bulgaria. He also promoted the creation of the Gardens of the Righteous Worldwide Committee in Milan, he created the first park dedicated to the victims of the gulag in the Valsesia Park of Milan and he spearheaded the creation of a memorial dedicated to the 1000 Italian victims of Soviet totalitarianism.