RACHELA AUERBACH – a psychologist, writer of Polish and Yiddish, along with thousands of other Jews, ended up in the Warsaw ghetto. There, she collaborated with the historian Emanuel Ringelblum, who set the goal to document the Holocaust as thoroughly as possible. As part of the work carried out for the Underground Archive of the Warsaw Ghetto, Auerbach collected reports on the ongoing destruction of the Jewish community. At the same time, she kept a journal and was involved in the activities of the Jewish Cultural Organization promoting Yiddish culture. In 1943, Auerbach moved to the Aryan side, without ceasing to write down the next stages of the Holocaust. Her retail, reportage and sometimes impressionistic records have survived as she did. After the war, Auerbach considered her mission to make the Jewish community aware in Poland and abroad that there was a hidden Archive under the ruins of the Warsaw Ghetto and led to its extraction. For the rest of her life she protected this surviving legacy. She was also involved in other documentation and archiving work. She worked for the Historical Commission of the Central Jewish Committee in Poland. She collected the diaries, memories and testimonies of the survivors, devoting all her post-war life to commemorating the murdered Polish Jews.