Architectural theory in the context of "Ekistics"

Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and constructing buildings or other structures. The term comes from Latin architectura; from Ancient Greek ἀρχιτέκτων (arkhitéktōn) 'architect'; from ἀρχι- (arkhi-) 'chief' and τέκτων (téktōn) 'creator'. Architectural works, in the material form of buildings, are often perceived as cultural symbols and as works of art. Historical civilizations are often identified with their surviving architectural achievements.

The practice, which began in the prehistoric era, has been used as a way of expressing culture by civilizations on all seven continents. For this reason, architecture is considered to be a form of art. Texts on architecture have been written since ancient times. The earliest surviving text on architectural theories is the 1st century BC treatise De architectura by the Roman architect Vitruvius, according to whom a good building embodies firmitas, utilitas, and venustas (durability, utility, and beauty). Centuries later, Leon Battista Alberti developed his ideas further, seeing beauty as an objective quality of buildings to be found in their proportions. In the 19th century, Louis Sullivan declared that "form follows function". "Function" began to replace the classical "utility" and was understood to include not only practical but also aesthetic, psychological, and cultural dimensions. The idea of sustainable architecture was introduced in the late 20th century.

Vitruvius (/vɪˈtruːviəs/ vi-TROO-vee-əs; Latin: [wɪˈtruːwi.ʊs]; c. 80–70 BC – after c. 15 BC) was a Roman architect and engineer during the 1st century BC, known for his multi-volume work titled De architectura. As the only treatise on architecture to survive from antiquity, it has been regarded since the Renaissance as the first book on architectural theory, as well as a major source on the canon of classical architecture. It is not clear to what extent his contemporaries regarded his book as original or important.

He states that all buildings should have three attributes: firmitas, utilitas, and venustas ("strength", "utility", and "beauty"), principles reflected in much Ancient Roman architecture. His discussion of perfect proportion in architecture and the human body led to the famous Renaissance drawing of the Vitruvian Man by Leonardo da Vinci.

Classical architecture typically refers to architecture consciously derived from the principles of Greek and Roman architecture of classical antiquity, or more specifically, from De architectura (c. 10 AD) by the Roman architect Vitruvius. Variations of classical architecture have arguably existed since the Carolingian Renaissance, and became especially prominent during the Italian Renaissance and the later period known as neoclassical architecture or Classical revival. While classical styles of architecture can vary, they generally share a common "vocabulary" of decorative and structural elements. Across much of the Western world, classical architectural styles have dominated the history of architecture from the Renaissance until World War II. Classical architecture continues to influence contemporary architects.

The term classical architecture can also refer to any architectural tradition that has evolved to a highly refined form, such as classical Chinese or Mayan architecture. It may also describe architecture that adheres to classical aesthetic philosophy. The term might be used differently from "traditional" or "vernacular architecture", it can share underlying axioms with it.

Antoine-Chrysostome Quatremère de Quincy (21 October 1755 – 28 December 1849) was a French armchair archaeologist and architectural theorist, a Freemason, and an effective arts administrator and influential writer on art.

Pythius (Greek: Πύθιος), also known as Pytheos (Greek: Πυθεός) or Pythis, was a Greek architect, architecture theorist, and sculptor of the 4th century BC. He designed the Temple of Athena Polias at Priene and the Mausoleum at Halicarnassus, which was regarded in antiquity among the Seven Wonders of the World. It is presumed that he came from the Greek city of Priene. The first-century BC Roman architect Vitruvius called Pythius a "celebrated builder" (de Architectura I.1.12) and referenced lost treatises on architecture written in Greek by Pythius as sources for his Latin architecture manual de Architectura (I.1.15).

Proportion is a central principle of architectural theory and an important connection between mathematics and art. It is the visual effect of the relationship of the various objects and spaces that make up a structure to one another and to the whole. These relationships are often governed by multiples of a standard unit of length known as a "module".

Proportion in architecture was discussed by Vitruvius, Leon Battista Alberti, Andrea Palladio, and Le Corbusier among others.

The Princeton University School of Architecture is the architecture school of Princeton University. Founded in 1919, the School is a center for teaching and research in architectural design, history, and theory. The School offers an undergraduate concentration (equivalent of major) and advanced degrees at the master's and doctoral levels.