- It is worth remembering today, the lessons that stem from this history. Firstly, what the motto of this exhibition tells us - united, unconquered - stated Prime Minister Donald Tusk at the Museum of the Battle of Warsaw 1920.

- We can differ, and that is perfectly understandable, on various matters, we can argue, just as the closest people argue, in families, as is known, it's similar in politics, and democracy relies on us arguing about thousands of less and more important matters, but on the issue of security, of joint action against threats, and they have re-emerged today from the East, we must be united, and this museum will fulfill its mission - he continued.

- It will be both educational and emotional, as museums are. But perhaps the most important mission of this museum, perhaps the most important lesson that flows from those days and from today, is that we must be united, as Poles and more broadly, as all of Europe, against the threats that are once again approaching from the East - said the head of government.