The date of 11 November 1918, being the day on which Poland regained its independence, is a symbolic date. Exactly on that day, an armistice ending the First World War was concluded in a wagon in the forest of Compiègne.

The Union of Soviet Socialist Republics was the first communist state in history. The decision to create it was taken on 30 December 1922.

Prayer of the Bar Confederates before the Battle of Lanckorona, oil painting by Artur Grottger.