Forostar said:You're right. But just as an addition: before he conquered it, it was Poland as well, in the time of the Polish-Lithuanian Commonwealth (apart from the Habsburg Empire in the 17th Century, see here).
Oh, I never denied that. Poland has had a long and distinguished history before Prussian times. One of my favourite historical characters is Boleslaw III., in fact.*
He came, he brought potatoes, and he left.
He did more than Caesar, then!
![Big Grin :D :D](/smilies/biggrin.gif)
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To be honest, I'm not very familiar with him at all. I have a Polish coin with his portrait, and I just fucking loved the name. If I ever have to christen a ship, it's for him.