The book has a total of 39 pages. Most of the 94 chapters are quite short. Sometimes they only consist of single sentences. Each chapter deals with a very specific topic and is separated from the previous chapter by a central heading. The text within the chapters is very compact and one line fills the whole width of the paper.
The font remains – as far as I can judge – the same throughout the book. Individual letters are sometimes written very large at the beginning of the chapter and extend over several lines.
Topics covered in the book are the topography of Rome, the city itself, the buildings and monuments of Rome (since my name is Titus, it made me smile that he talks about the Arch of Titus in Rome on page 15). On the other hand, Pirro Ligorio also talks about the social and political institutions of ancient Rome and shares the everyday life of the Roman people and talks about their customs.
This suggests that Pirro Ligorio wrote the book as a kind of reference book about the antiquities of Rome. The reader is given a brief overview of a very wide range of topics.
On one of the first pages you will find the “ex-libris coat of arms”. This is the only illustration in this book. During my visit I was told that the decision to do without illustrations was probably made for economic reasons. The “ex-libris coat of arms” is a piece of paper or a stamp glued into books to identify the owner.
At this point it is not possible to say anything more about the image references or the relationship between text and illustrations. The illustrations are secondary in this book. It is actually only about the text.