21. 8. 1968 - Invasion of the Warsaw Pact troops

Vznik nezávislého odborové hnutí Solidarita, Výjimečný stav v Polsku

21. 8. 1968 - Invasion of the Warsaw Pact troops, 25. 2. 1948 - Communist coup d‘état in ČSR, 8. 5. 1945 - End of WWII, 1945 - 1946 Resettlement of Poles in the "Regained lands" , 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

26.8. 1980 Solidarity strike in Wroclaw , 28.8. 1980 Holy Mass for strikers in the bus depot in Wrocław

September 1939- occupation of the entire Upper Silesia by Germany, 21. 8. 1968 - Invasion of the Warsaw Pact troops

23. 2. 1949 – Beginning the forced agricultural collectivisation, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

8. 5. 1945 - End of WWII

5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops