The old town's square reminded me of the one in Kraków, in that it's not so much a square as a four-sided torus. Basically, it's a rectangular space with buildings in the middle.
Poznan's old town square is quite pretty:
All except for this part, which isn't pretty:
I'm sure that the people back in old-town times were of the opinion that the buidings I think are pretty now weren't pretty then, so perhaps people of the future will like this sore thumb sticking out in an otherwise historical setting.
Well, people of the future, you're wrong and I'm right.