The book “I dieci libri dell’achittetura di M. Vitruvio” by Daniele Barbaro is – as the title is already suggesting – divided into ten parts (books) . Each part is dedicated to a different architectural topic. On the frontispiece you can find the title in capital letters, surrounded by an image which fills up the entire page. After a few pages of introduction, you get to read the first part “Il primo libro dell’ architettura di M. Vitruvio”. The title is written in capital letters and the font is also bigger than the rest of the text. The first letter of every paragraph is always relatively big and framed with a little image. At the beginning of every ‘book’ there is always an introduction, sometimes shorter and sometimes longer. The ten different parts are further divided into several chapters. The titles of the single chapters are not I written in capital letters, but in a bigger font size. In the book there are several illustrations. There are 123 illustrations to be exact, which is not that many, when you look at the number of pages (522). The images are scattered throughout the entire book. Sometimes there are sketches, detailed illustrations of architectural elements, front views of buildings and also floor plans. Some drawings are extremely detailed but in a clean and easily comprehensible way. The illustrations are not numbered, but most of the illustrations are provided with a list of contents. Most of the time you find a lot of pages with text only and then sometimes the illustrations/drawings are incorporated into the text. There are also some pages with drawings only, either one big drawing or a few smaller ones. On the last pages of the book you can find a chart with measurements of the stars, an index as well as a glossary. The way this book is divided and the way the author writes about Vitruvius, suggests that this book was used as a handbook, as a kind of guideline or even as a Holy Grail of architectural principles.