The main part of the Head First Software Architecture book is a catalog of architecture styles; this is the first of several chapters delving in the structure, communication, and all the other characteristics of named architectural styles, in this case, the Layered Architecture. We start with the traditional layered architecture as it is so common, and it has an easy to understand structure. We discuss its uses, how layered related to the domain, and limitations. For each architectural style, we also cover the Superpowers and Kryptonite for that style.