Ruth "Rutka" Laskier was a Jewish Polish diarist who is best known for her 1943 diary chronicling three months of her life during the Holocaust in Poland. She was murdered at Auschwitz concentration camp in 1943 at the age of fourteen. Her manuscript, authenticated by Yad Vashem, was published in the Polish language in early 2006. English and Hebrew translations were released the following year. It has been compared to the diary of Anne Frank.