The Holocaust cast a dark shadow over the 20th century. Created by the Nazi regime as their “final solution” to the Jewish question, it led to the systematic extermination of over six million Jews and other “undesirables”, forever changing the course of history.

One of the most famous stories to emerge from this dark period was Anne Frank’s. When she was a teenager, she and her Jewish family went into hiding in an attic in Amsterdam, and she kept a diary that documented the horrors of the period in an unrivaled way.

To discover exactly what horrors Anne and her family lived through, check out the video below: 

Now, it’s emerged that like so many teenage girls, there were “secret” parts of her diary that she tried to keep hidden from her family.

Covering these pages with brown paper to stop her family from reading them, it has only been with the help of modern digital editing techniques that their contents have finally been deciphered for the first time, exposing the “dirty” jokes that Anne wrote when she was just 13.

The historical significance of these jokes lies in the fact that while Anne showed wisdom and perception well beyond her years in her diary, she was still a teenager who was fascinated by sex, and the jokes uncovered centered around sex, contraception, and prostitution.