Here is a nice cover from Italy.
It features the last year's Charles Darwin's stamp, which I think was issued if not in all then in the majority of countries, regarding the Bicentennial of Darwin's birth. Macedonia issued a Darwin stamp as well.
As you most probably know, he is most famous for his Origin of Species theory which is considered to be the foundation of the evolutionary biology.
This cover also came with a nice and neat cancellation, thanks to Riccardo.