La Basilica Di San Pietro

Seeing a digital version of it in such detail only further reinforces how important it is to experience it in person.

Few sights of man-made things have instilled as much awe in me as La Basilica Di San Pietro and most of them are also in Rome (namely the Pantheon and Moses @ Basilica di San Pietro in Vincoli).

You can't understand the scale of it until you experience it in person. The way I thought of it was that it is a cathedral made for giants.

Exactly. And it was a great marketing tool for catholicism, imagine simpler (even if rich) folks came to visit the pope and experienced this marvel of medieval construction. You feel utterly insignificant on purpose, feeling weak and in presence of something much larger is an easy way to more faith, a truth valid for all humans across all time.

But to me, despite all of this, there was a lot of sadness in that experience - because you know how desperately poor common folks were, how instead of building such status mega symbol they could have done some proper good. But not for church of that era, it was busy fighting for power and money of that world and trying to show how above everybody else they were.

You can see miniature scale of this in literally every (also non-) older European village or town - religious buildings have received by far the most funding and care, sometimes overshadowing kings castles themselves. Cathedrals were always built to impress masses, and this one is just on top of the game, by huge margin for good reasons I believe.