The book is divided into two parts. In the first, the reader is taken on an ideal ‘world tour’ of many wonderful and enigmatic places in almost every continent, in search of traces of astronomical knowledge and lore of the sky. In the second part, Giulio Magli uses the elements presented in the tour to show that the fundamental idea which led to the construction of the astronomically-related giant monuments was the foundation of power, a foundation which was exploited by ‘replicating’ the sky.