Seventy years ago, on her 13th birthday, Anne Frank received what would become the world's most famous diary.
The red-checkered notebook was given to Frank by her father, Otto, on June 12, 1942—22 days before Frank and her German-born Jewish family went into hiding during the Nazi occupation of the Netherlands.
"I hope I will be able to confide everything to you, as I have never been able to confide in anyone," Frank wrote in the diary on the same day. "And I hope you will be a great source of comfort and support."
Frank died in 1945 in a German concentration camp—crazy to think that Frank would've been just 83 today had she survived.
The diary was published posthumously in 1947 by her father.
Frank's diary, Rosemary Jean-Louis wrote on GPB.org, "is an example of rudimentary social media that in the end made a tremendous impact."