Anne Frank was a Jewish girl who lived in Amsterdam and hid from the Nazis during World War II. Her diary, which she wrote while in hiding for two years, documented her experiences and became famous after her death in a concentration camp at age 15. The diary provides insights into Anne's life before and during hiding, her family's reasons for fleeing Germany, and the conditions they endured while secretly living in an annex for two years until they were eventually discovered and arrested.