The Title of the book is Architettura della basilica di S. Pietro in Vaticano and it is written by Giovanni Battista Costaguti. In the Title it says, that it is about the St. Peter’s Basilica in the Vatican. This is a very descriptive title without generating tension it is very neutral. The book doesn’t have a list of context. But it has a clear structure. On the first 20 pages is a written text that I unfortunately can not understand, because of the Italian language. After that follow many pictures of the basilica. There are a lot of Views and floor plans in this book. The pictures were probably made with a linoleum print. The Views and the floorplans are drawn in great detail and they are often described with numbers and the corresponding definitions. There is always a page left out between the drawings because the color pushes through the paper, which means there are many blank pages in the book. That is why the book is very thick. The book is also very large. One page is about an A3 size. The size of the book also allows the detailed drawings. Giovanni Battista Costaguti comes from an Italian family. He became a cleric and later Dean of the Apostolic Chamber. Later he became a cardinal priest. Knowing this background, I think it was important for him to depict his houses of prayer. Because of the detail, I assume that he was also very fascinated by the architecture.