I think you were a little bit trigger happy with that.

Show me where Poland was on the map before the Western powers drew it on the map after WW1.

Much like Lebanon which has cultural heritage going back, so does Poland. But maps might not reflect that.

Most of the maps in https://en.wikipedia.org/wiki/History_of_Poland or clicking around https://en.wikipedia.org/wiki/Kingdom_of_Poland suggest Poland has borders about as stable as any country.

Sure parts of what is now Russia have been part of Poland before, but the center is surprising stable.

Take your pick https://en.wikipedia.org/wiki/Kingdom_of_Poland