Let me play the devil's advocate here for a moment. Let's talk about the Battle of Vienna, 1683. Who was in charge of that battle and beat back the Turks? Oh, that's right, King Sobieski of the Polish-Lithuanian commonwealth. The Poles fielded twice as many troops as the Austrians in that battle. The angry Pole (for I have no doubt he's a Pole ;P) has his dates somewhat wrong, but Poland/Lithuania *was* a major player during the 16th/17th century, before the insane corruption of the szlachta brought the country to its knees. In 1683, when Poland dealt this resounding defeat to the Turks and drove them out of Europe, it was way past the zenith of its power already, having lost much territory thanks to rather unfortunate decisions of its nobility in the Sejm, the Polish parliament. Have a look at the territorial size of Poland in 1635 and then tell me what other country in Europe was this big. I'll help you: none. None came close. Styling it the most powerful country in the world is clearly patriotic exaggeration, but if we restrict ourselves to Europe, let's say it was clearly one of the greater countries. I know, this is the part of European history they don't teach you at school (I am German, and I had to look all this stuff up myself) (Full disclosure: my mother is Polish, but I have no patriotic feelings whatsoever), but don't dismiss the notion without some research. Including Austria and not Poland is surely a decision that would be hard to defend historically.