How to Study Architecture

by Charles H. Caffin

In an effort also to lead the people back to the honourable simplicity of their forefathers, Augustus revived the ancient religious ceremonies and restored the temples. He became chief pontiff and, being regarded as the son of the deified Julius—in reality, his great-nephew—was treated almost as a divinity in Rome and deified by the provincials who built temples in his honour.

It was in the Augustan Age that Roman architecture virtually commenced and its developments are associated with Imperial rule. Of the period immediately preceding the new era Mommsen writes as follows: “There was in the world as Cæsar found it much of the noble heritage of past centuries and an infinite abundance of pomp and glory, but little spirit, still less taste and least of all true delight in life. It was indeed, an old world; and even the richly gifted patriotism of Cæsar could not make it young again.”

Rome, the heart of the Empire, was corrupt. The ruling class coveted pensions from the public exchequer to be spent on luxurious living; while the mass of the populace clamoured for “panem et circenses”—feeding and shows at the public charge. To satisfy their hunger both classes would have taxed the provinces. But among the chief duties of the emperors were the development of the resources of the provinces and the protection of the frontiers; and, while the best of the emperors performed these functions from high motives, even the worst found it politic to court the growing power of the provinces. Thus, the main vitality of the empire was in its extremities, and, although the emperors beautified Rome, they also encouraged public works of utility and beauty in the provinces. To this end a law was passed, permitting municipalities to receive bequests and gifts from private individuals. In the liberality with which wealthy provincials enriched their communities, Dr. Ferrero, the latest historian of Rome, has seen a parallel to the munificent public gifts of American millionaires.

Accordingly, this great era of Roman building left its impress not only upon Italy, but in Greece and northward as far as the Danube, in Asia Minor, Syria, Palestine, Egypt, along the whole Northern coast of Africa, and in Spain, France, and Great Britain as far as the Firth of Forth. It was distinguished not only by the magnitude of the operations but also by their character.

Whereas in Egypt the architectural works had consisted of temples and tombs; and in Hellas these had been supplemented by theatres and odeia; while Assyria and Persia left their memorials in palaces, those of the Roman Empire embraced all of these types and many more. The Romans applied architecture to the practical needs of everyday life, and reinforced it with engineering. They overlaid the Empire with fine trunk-roads, many of which survive to-day; constructed sewers; spanned rivers with bridges; conveyed water in countless miles of aqueducts; erected fora and market-places, triumphal arches, temples, palaces, villas, baths, basilicas, theatres, and hippodromes; providing alike for the necessities of life, the needs of government, and the amusements and luxuries of living.

To accomplish so prodigious an amount of building the Romans systematised the methods of construction in regard to both the labour and the material. The labour was mainly of an unskilled kind, including soldiers of the legions, slaves, and subjects liable through debt or other causes to statute labour. This employment of unskilled labour was made possible by the Roman habit of carrying the principle of repetition of motives to its utmost limit, and also by the methods of construction which they invented.

This was the extended use of concrete. During the Republic the Romans had followed the Greek method of building with large blocks of stone, unconnected with mortar. Their practical spirit, however, urged them to make a more economical use of materials and instead of composing the walls entirely of blocks of stone or marble, they used these or bricks as a facing, filling in the thickness of the wall with small fragments of stone mixed with lime or mortar.

They had been led to this practice by the existence of pozzolana, a volcanic product of clean, sandy earth, found in Rome and in greater quantities at Pozzuoli on the Bay of Naples, which, when mixed with lime, formed a concrete of exceptional hardness, strength, and durability. Material, approximating the properties of pozzolana and lime, was procurable in all parts of the Empire. Accordingly the use of this method of construction gave a similarity to Roman building everywhere.

While the chief, and almost sole building material in Greece was marble, the geological formation of Italy supplied stone as well as marble and plentiful supplies of clay, which was converted into terra-cotta or bricks. The bricks were of two shapes: either square, from 1 to 2 feet in size and 2 inches thick or triangular in plan and of about 1½ inches in thickness. The latter were especially used for the facing of the walls, their pointed ends being driven into the concrete to form the smooth surfaces, while at the corners the points projected. In Rome itself the following materials were available: travertine, a hard limestone from Tivoli; tufa, a volcanic substance of which the hills of Rome are mainly composed; and peperino, a stone of volcanic origin from Mount Albano.

While Roman architecture was developed under the stimulus of Greek art and culture it probably owes its origin to the example of the Etruscans.