Whose diary documented life hiding during the Holocaust?

Anne Frank, a Jewish teenager, kept a diary while hiding with her family and others in a concealed annex in Amsterdam from 1942 to 1944, during the Nazi occupation of the Netherlands. She wrote candidly about daily life in hiding, her fears, hopes and thoughts on the world, addressing many entries to an imaginary friend she called Kitty. The group was eventually discovered and deported; Anne died in the Bergen-Belsen concentration camp in 1945, aged 15. Her father Otto, the only member of the hidden group to survive, had the diary published in 1947. It has since been translated into around 70 languages and read by millions.