European university rankings". The Times do one among others. Check them all. Methodology is explained. Poland doesn't rank highly in any.
I had a look at that ranking, and it is worth fukck all, totally unreliable and very subjective. Have a look at the criteria.
Teaching — the learning environment (worth 30 per cent of the overall ranking score)
Research — volume, income and reputation (worth 30 per cent)
Citations — research influence (worth 32.5 per cent)
Industry income — innovation (worth 2.5 per cent)
International mix — staff and students (worth 5 per cent).
putting it into layman's terms: teaching-How does one asses a learning environment? As far as a place of study is concerned then I sure as hell would pick Krakow over Sheffield or Leeds any day.
Reasearch: Let me guess it has to be conducted and published in English, otherwise nobody takes any notice
Citations: I guess this is the only really objective measure in this ranking.
Industry income: A rich university doesn't always equal a good university, they should know this by know-the Poles spend a lot less on their education system and yet get better results than the Brits, according to the very objective PISA study.
International mix: so if you do not have a whole bunch of foreigners studying in your uni you miss out, this is a biased measure because it naturally favors English universities.
So for what's it worth, I would wipe my rear end with this ranking, it is completely biased and unreliable.