In the Middle Ages St Michael the Archangel was considered a Satan slayer, so he was often depicted fighting with the dragon. The cruel beast symbolizes the devil but also refers to the legend of St Margaret. The scenes that can be seen on bas-reliefs are also shown on keystones in St Margaret’s Chapel on the northern side of the ambulatory of the cathedral chancel. This, iner alia, confirms the origins of sculptures installed in the façade.
We are all well aware that to enter this Cathedral can not be without emotion. More I say, you can not enter it without the internal tremor, without fear because it contains in it - as in almost no Cathedral of the world - the enormous size, which speaks to us in all our history, our entire past.cardinal Karol Wojtyla