- Vitruvius was the earliest known author on architectural theory whose work survived from antiquity. His writings have been influential for over 1800 years and established the classical orders of architecture.
- Leon Battista Alberti was an important Renaissance theorist who sought to provide a more coherent basis for theory and emphasized beauty, proportions, and the imitation of nature.
- Andrea Palladio established a successful way of recreating ancient classicism through his architectural works and theoretical book. He was influenced by Alberti, Bramante, and classical antiquity and focused on relating architecture to art, nature, and principles of symmetry.