Karol was in Krakow that day. He lived there. As the warning came that stormtroopers were closing in on his street, the young actor fell to his knees in a room (or basement) of his uncle's house. He prayed fervently that he would not be found.
But, as guards crashed through the front door and began their search of the property, it seemed like his prayers could come to no avail.
They walked right past him. As Karol prayed in plain sight, the Nazis tore through every potential hidey-hole in the house, yet seemed not to see him at all. As soon as they left, he and his female cousin stared at each other in utter disbelief. But there was no time to waste.
She secreted him away to the Archbishop's Palace, where the waiting clerics were pleased to lend Karol a cassock and pretend that he was one of them. He couldn't make liars of them, especially since it seemed like some guardian angel had kept him safe from arrest.
Karol was ordained into the priesthood in Wawel Cathedral. He officiated over his first ever mass there. Twelve years later, he was back before that same altar being confirmed as Auxiliary Bishop of Krakow, serving under Archbishop Eugeniusz Baziak.
From then, Karol's progress appeared nothing short of astronomical. Within months, he was being ordained as Poland's youngest ever bishop, again in Wawel Cathedral.
Four years later, following the death of Archbishop Baziak, Karol became the main priest in Wawel Cathedral. He was made Vicar Capitular - a kind of temporary administrator, who keeps things ticking over until the new archbishop can be appointed.
There's a certain inevitability about the fact that the new Archbishop of Krakow turned out to be Karol himself. From there, it was just a short step towards becoming a cardinal, and finally the Pope. All but the latter occurred for him in Wawel Cathedral, so yes, his ties there were very personal indeed.