Architect Vitruvius wrote the earliest work on the subject of architecture "De architectura", known today as ''The Ten Books on Architecture''. Vitruvius' fundamental principles of architecture were ''firmitas, utilitas, venustas'' (firmness, commodity and delight). | Architect Vitruvius wrote the earliest work on the subject of architecture "De architectura", known today as ''The Ten Books on Architecture''. Vitruvius' fundamental principles of architecture were ''firmitas, utilitas, venustas'' (firmness, commodity and delight). |