Radio Poland's Marcin Matuszewski has the details in his audio report - available in our player (red button above and on the left).
Prime Minister Donald Tusk, Minister of Defence Władysław Kosiniak Kamysz and Speaker Szymon Hołownia were all in Westerplatte this morning to commemorate the outbreak there of World War Two.
The Battle of Westerplatte was the beginning of the German invasion of Poland on 1st September 1945 at 4.45 am. Westerplatte is a peninsula in today's Gdańsk - in 1945, the free city of Danzig.
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Sources: PAP, X