I have chosen those pages because they all have the same content. Which means the index shows us that the text that belongs to the St. Peter’s Basilica, or how they call it the Vatican Basilica, is in chapter 4, and starts on page 27.
On the last two pages that I’ve chosen, we see drawings of the St. Peter’s Basilica. The first drawing represents a precise ground view of the basilica. It shows us on the left the atrium, and when you enter you can see the 5 naves and the transept. It’s built in a classic roman way. The following page to the plan is a drawing of the side section of the building.