Cover from Italy

On the 10-th of December  after 17 days of travelling I got this letter from Italy. this time it's devoted to the outstanding scientist - Charles Darwin. I believe there is no need to write about his genious - all of us know his theory of evolution. There is some exact information about the stamp:

In the foreground is a portrait of the scientist Charles Darwin, while in the background is a detail of the title page of the first edition of his work ON THE ORIGIN OF SPECIES, published in 1859. At the bottom on the left are a number of outlines representing the evolution of the human race, from the first hominids to homo sapiens. 

Thank you very much, Lorenzo!