Ancient Roman architecture
Ancient Roman architecture adopted the external language of classical ancient Greek architecture for the purposes of the ancient Romans, but was different from Greek buildings, becoming a new architectural style. The two styles are often considered one body of classical architecture. Roman architecture flourished in the Roman Republic and to an even greater extent under the Empire, when the great majority of surviving buildings were constructed. It used new materials, particularly Roman concrete, and newer technologies such as the arch and the dome to make buildings that were typically strong and well engineered. Large numbers remain in some form across the former empire, sometimes complete and still in use today.
Roman architecture covers the period from the establishment of the Roman Republic in 509 BC to about the 4th century AD, after which it becomes reclassified as Late Antique or Byzantine architecture. Few substantial examples survive from before about 100 BC, and most of the major survivals are from the later empire, after about 100 AD. Roman architectural style continued to influence building in the former empire for many centuries, and the style used in Western Europe beginning about 1000 is called Romanesque architecture to reflect this dependence on basic Roman forms.
File:France-002364 - Square House.jpg|thumb|The Maison carrée in Nîmes, one of the best-preserved Roman temples, c. 2 AD
The Romans only began to achieve significant originality in architecture around the beginning of the Imperial period, after they had combined aspects of their originally Etruscan architecture with others taken from Greece, including most elements of the style we now call classical architecture. They moved from trabeated construction mostly based on columns and lintels to one based on massive walls, punctuated by arches, and later domes, both of which greatly developed under the Romans. The classical orders now became largely decorative rather than structural, except in colonnades. Stylistic developments included the Tuscan and Composite orders; the first being a shortened, simplified variant on the Doric order and the Composite being a tall order with the floral decoration of the Corinthian and the scrolls of the Ionic. The period from roughly 40 BC to about 230 AD saw most of the greatest achievements, before the Crisis of the Third Century and later troubles reduced the wealth and organizing power of the central governments.
The Romans produced massive public buildings and works of civil engineering, and were responsible for significant developments in housing and public hygiene, for example their public and private baths and latrines, under-floor heating in the form of the hypocaust, mica glazing, and piped hot and cold water.
Overview
Despite the technical developments of the Romans, which took their buildings far away from the basic Greek conception where columns were needed to support heavy beams and roofs, they were reluctant to abandon the classical orders in formal public buildings, even though these had become essentially decorative. However, they did not feel entirely restricted by Greek aesthetic concerns and treated the orders with considerable freedom.Innovation started in the 3rd or 2nd century BC with the development of Roman concrete as a readily available adjunct to, or substitute for, stone and brick. More daring buildings soon followed, with great pillars supporting broad arches and domes. The freedom of concrete also inspired the colonnade screen, a row of purely decorative columns in front of a load-bearing wall. In smaller-scale architecture, concrete's strength freed the floor plan from rectangular cells to a more free-flowing environment.
File:Aqueduct_of_Segovia_02.jpg|thumb|Aqueduct of Segovia, Segovia, Spain
Factors such as wealth and high population densities in cities forced the ancient Romans to discover new architectural solutions of their own. The use of vaults and arches, together with a sound knowledge of building materials, enabled them to achieve unprecedented successes in the construction of imposing infrastructure for public use. Examples include the aqueducts of Rome, the Baths of Diocletian and the Baths of Caracalla, the basilicas and Colosseum. These were reproduced at a smaller scale in the most important towns and cities in the Empire. Some surviving structures are almost complete, such as the town walls of Lugo in Hispania Tarraconensis, now northern Spain. The administrative structure and wealth of the Empire made possible very large projects even in locations remote from the main centers, as did the use of slave labor, both skilled and unskilled.
Especially under the empire, architecture often served a political function, demonstrating the power of the Roman state in general, and of specific individuals responsible for building. Roman architecture perhaps reached its peak in the reign of Hadrian, whose many achievements include rebuilding the Pantheon in its current form and leaving his mark on the landscape of northern Britain with Hadrian's Wall.
Origins
While borrowing much from the preceding Etruscan architecture, such as the use of hydraulics and the construction of arches, Roman prestige architecture remained firmly under the spell of ancient Greek architecture and the classical orders. This came initially from Magna Graecia, the Greek colonies in southern Italy, and indirectly from Greek influence on the Etruscans. This influence intensified following the Roman conquest of Greece, a process culminating in the sack of Corinth in 146 BCE, after which Greek artworks were transferred to Rome. These works provided direct models for Roman architects and artists, a phenomenon evident in practices such as the introduction and use of the triclinium in Roman villas. Roman builders employed Greeks in many capacities, especially in the great boom in construction in the early Empire.Roman architectural revolution
The Roman architectural revolution, also known as the "concrete revolution", was the widespread use in Roman architecture of the previously little-used architectural forms of the arch, vault, and dome. For the first time in history, their potential was fully exploited in the construction of a wide range of civil engineering structures, public buildings, and military facilities. These included amphitheatres, aqueducts, baths, bridges, circuses, dams, domes, harbours, temples, and theatres. According to Gottfried Semper, Roman architecture was "the idea of world domination expressed in stone".A crucial factor in this development, which saw a trend toward monumental architecture, was the invention of Roman concrete, which led to the liberation of shapes from the dictates of the traditional materials of stone and brick.
These enabled the building of the many aqueducts throughout the Roman Empire, such as the Aqueduct of Segovia, the Pont du Gard, and the eleven aqueducts of Rome. The same concepts produced numerous bridges, some of which are still in daily use, for example, the Puente Romano at Mérida in Spain, and the Pont Julien and the bridge at Vaison-la-Romaine, both in Provence, France.
The dome permitted the construction of vaulted ceilings without crossbeams and made possible large covered public spaces such as public baths and basilicas, such as Hadrian's Pantheon, the Baths of Diocletian and the Baths of Caracalla, all in Rome.
The Romans first adopted the arch from the Etruscans and implemented it in their own building. The use of arches that spring directly from the tops of columns was a Roman development, seen from the 1st century AD, that was very widely adopted in medieval Western, Byzantine and Islamic architecture.
Domes
The Romans were the first builders in the history of architecture to realize the potential of domes for the creation of large and well-defined interior spaces. Domes were introduced in a number of Roman building types such as temples, thermae, palaces, mausolea and later also churches. Half-domes also became a favored architectural element and were adopted as apses in Christian sacred architecture.Monumental domes began to appear in the 1st century BC in Rome and the provinces around the Mediterranean Sea. Along with vaults, they gradually replaced the traditional post and lintel construction which makes use of the column and architrave. The construction of domes was greatly facilitated by the invention of concrete, a process which has been termed the Roman architectural revolution. Their enormous dimensions remained unsurpassed until the introduction of structural steel frames in the late 19th century.
Influence on later architecture
Roman architecture supplied the basic vocabulary of Pre-Romanesque and Romanesque architecture, and spread across Christian Europe well beyond the old frontiers of the empire, to Ireland and Scandinavia for example. In the East, Byzantine architecture developed new styles of churches, but most other buildings remained very close to Late Roman forms. The same can be said in turn of Islamic architecture, where Roman forms long continued, especially in private buildings such as houses and the bathhouse, and civil engineering such as fortifications and bridges.In Europe the Italian Renaissance saw a conscious revival of correct classical styles, initially purely based on Roman examples. Vitruvius was respectfully reinterpreted by a series of architectural writers, and the Tuscan and Composite orders formalized for the first time, to give five rather than three orders. After the flamboyance of Baroque architecture, the Neoclassical architecture of the 18th century revived purer versions of classical style, and for the first time added direct influence from the Greek world.
File:VillaCornaro 2007 07 14 front 1.jpg|thumb|Villa Cornaro, designed by Andrea Palladio in 1552
Numerous local classical styles developed, such as Palladian architecture, Georgian architecture and Regency architecture in the English-speaking world, Federal architecture in the United States, and later Stripped Classicism and PWA Moderne.
Roman influences may be found around us today, in banks, government buildings, great houses, and even small houses, perhaps in the form of a porch with Doric columns and a pediment or in a fireplace or a mosaic shower floor derived from a Roman original, often from Pompeii or Herculaneum. The mighty pillars, domes and arches of Rome echo in the New World too, where in Washington, D.C. stand the Capitol building, the White House, the Lincoln Memorial, and other government buildings. All across the US the seats of regional government were normally built in the grand traditions of Rome, with vast flights of stone steps sweeping up to towering pillared porticoes, with huge domes gilded or decorated inside with the same or similar themes that were popular in Rome.
In Britain, a similar enthusiasm has seen the construction of thousands of neoclassical buildings over the last five centuries, both civic and domestic, and many of the grandest country houses and mansions are purely Classical in style, an obvious example being Buckingham Palace.