The source novel was virtually banned in West Germany when it was first published in the late 1950s. When it was republished in 2003, it became a huge bestseller and nationwide sensation in a reunified Germany.

Anonyma was later revealed to be journalist Marta Hillers.

As a protective measure the author requested her anonymity as author of her book: Eine Frau in Berlin (A Woman In Berlin).

In the four months that the Soviet army occupied Berlin, the soldiers raped an estimated 95,000 to 130,000 females. A Soviet war correspondent reported that soldiers were raping every German female "between 8 and 80."

The movie's source novel is the diary of an unnamed woman, called Anonyma, from April 29, 1945 to June 22, 1945.