What is the title of the foundational book written by Vitruvius on architecture?

The title of the foundational book written by Vitruvius is "De Architectura Libri Decem," which translates to "Ten Books on Architecture" in English. This work is significant as it is one of the earliest comprehensive texts on architecture, attributed to the Roman architect Vitruvius in the 1st century BCE. In this book, Vitruvius discusses a variety of topics, including the principles of design, the importance of site selection, and the methods of construction, integrating practical advice with philosophical considerations. The text serves not only as a manual for architects but also as a historical document that provides insight into the architectural practices and theories of the ancient Roman world.

Other titles, while related to architecture, do not specifically reference the work of Vitruvius. "The Ten Books of Architecture" is a translation of the original Latin title but lacks the authenticity of the original name. "Architecture and Its Contexts" and "Principles of Architecture" do not correspond to Vitruvius' work and instead reflect more contemporary discussions on architectural theory and practice. Thus, the original title remains the most accurate reference to Vitruvius' contribution to architecture.