Described in a lot of places as one of the most cathedrals in Europe. We have to admit, the place is really beautiful and impressive. There were several original Carravagio paintings, immense number of perfect details and many many more. Everywhere you look you see something special. It made me think of the San Pedro Apóstol de Andahuaylillas Church we have seen in Peru. Make sure to foresee enough time and arrive way before closing time. The cathedral is quite big, there are several naves, catacomb, paintings, … Make sure to take the stairs close to the entrance to go to the top, from where you can look at the church from above. Good place to take some pictures and to our impression many people overlooked it. There are self audio tours, but we thanked for that.
The entrance fee was 15 euro per person which we think is just too high, certainly if you have see impressive cathedrals in the past. We also decided we will do less and less things like this. We are nature people, and would rather spend our time there than in some cathedral. Of course, if this is your interest or one of your first travels, make sure to visit this cathedral, as it is really impressive.