On July 25, 1939, at a secret villa in Pyry near Warsaw, one of the most groundbreaking meetings in the history of 20th-century military intelligence took place. On that day, Polish heads of the cipher office – Colonel Gwido Langer, major Maksymilian Ciężki and Colonel Stefan Mayer handed over the secret of the German Enigma … Continue reading July 25, 1939 – Poles hand over the secret of the Enigma to the Allies – a key contribution of Polish cryptologists to the victory over Nazi Germany.