Polish law is weird (like all law systems). If you insult Putin in Poland, you can go to prison for up to three years. That's because there's a law on insulting heads of foreign states. Apparently it was introduced to prevent insulting John Paul II, a pope, though I can't find any reliable sources for that at the moment.
@EricLawton No. As far as I know, in Polish law stating an ugly truth is not always an acceptable defence when charged with insulting. I might be wrong :)