There are more valid facts and details in works of art than there are in history books.
From “My Autobiography” : “His [Sergei M. Eisenstein] film Ivan the Terrible, which I saw after the Second World War, was the acme of all historical pictures. He dealt with history poetically — an excellent way of dealing with it. When I realize how distorted even recent events have become, history as such only arouses my scepticism. Whereas a poetic interpretation achieves a general effect of the period. After all, there are more valid facts and details in works of art than there are in history books.”