Hello, Martina!
The The Cretto de Burri is truly a work of art, which, even for those passing through as you were, leaves no-one indifferent. It's a bit reminiscent of Ground Zero in New York, isn't it? It's as if they want to keep the place sacred, and that it shouldn't be rebuilt, but kept in the memory of those who lived there and those who pass through. I have to confess that the church has a Soviet feel to it, due to its grandeur and "brutality", as your guide characterized it.
I know very little about Italy, I only visited Milan in 2005, at the time for a European Youth Meeting, having stayed in a small town on the outskirts of Milan called Melzo.
I'll have to take a holiday one day to get to know some of the most iconic cities Bella Italia has to offer.
Thanks for sharing with us!