De Architectura is a treatise on architecture written by the Roman architect Vitruvius around 15 BCE. It is one of the earliest comprehensive texts on architecture, covering various topics such as building materials, construction techniques, and the importance of symmetry and proportion in design. The work is divided into ten books, each addressing different aspects of architecture, including urban planning, public buildings, and the role of the architect. De Architectura has significantly influenced architectural theory and practice throughout history, serving as a foundational text for both ancient and modern architects.