When the last witnesses who can say "I was there" die, history begins to fall silent. The memory of the Warsaw Ghetto Uprising, one of the most tragic episodes of the Holocaust, gradually becomes a cold fact in the history books.Using artificial intelligence voice cloning, we immortalized the testimony and emotions of the witnesses of Warsaw Ghetto Uprising.We created a voice sample with the essence of the emotion from an archive recording of Stella in Portuguese from 1997. And we used Stella's voice to tell the world for the first time her memories of the uprising, previously locked away in museum archives. To tell it as Stella would have - in a voice full of fear and pride, glory and disgust. With real emotions brought back to life.And the world listened.Stories about Warsaw Ghetto Uprising witnesses was published in about 150 articles and received more than 5 million views on social media. It raised interest in a subject that, 80 years after the war, does not evoke so much emotion and has become just another tragedy from the history books.The exhibition telling the full story of Stella and other civilian witnesses of the Ghetto Uprising attracted more than 136 000 visitors and was the most popular exhibition in the history of the POLIN Museum of the History of Polish Jews.In this way, 80 years after the war, we have brought to life the emotions of the Warsaw Ghetto Uprising, making them resonate for centuries and remind us of the tragedy of the Holocaust.