Twentieth Century Fox was known for trying new versions of media that other companies had already laid claim to. One of these experiments was their take on the princess faerytales by creating Anastasia. The film was based on the historical events of the Russian royal family and the tragic event that claimed many of their lives.
There are numerous detective stories in the world with them all dating back to the first fiction detective. Sherlock Homes is the person many people consider as the original. Sir Arthur Conan Doyle created the man behind the legends creating a character some believe to be real.