De Architectura

De Architectura was a book written by the Roman architect and engineer Vitruvius during the 1st century BCE. When the work was stolen by soldiers from the Kyrenaike Roman Citadel, the Medjay, Bayek, helped the engineer to retrieve the stolen book.

Description
''I dedicate this great work to the goddess. In it, I Vitruvius will discuss the tenets of architecture. Architecture has three branches; building, dialing, and mechanics. Building is divided into two parts. The first regulates the general plan of a city and its public building; the other relates to private buildings. Public buildings are for defense, religion, and the shelter of the public. Buildings for defense shelter the city's inhabitants agaisnt the attacks of an enemy.

Reference

 * Assassin's Creed: Origins