Opus africanum is a form of ashlar masonry used in Carthaginian and ancient Roman architecture, characterized by pillars of vertical blocks of stone alternating with horizontal blocks, filled in with smaller blocks in between.
Its name derives from the Roman province of Africa, and is common in North Africa, but also found in Sicily and Southern Italy.
A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term brick denotes a unit primarily composed of clay, but is now also used informally to denote units made of other materials or other chemically cured construction blocks. Bricks can be joined using mortar, adhesives or by interlocking. Bricks are usually produced at brickworks in numerous classes, types, materials, and sizes which vary with region, and are produced in bulk quantities.
The ancient Romans were the first civilization to build large, permanent bridges. Early Roman bridges used techniques introduced by Etruscan immigrants, but the Romans improved those skills, developing and enhancing methods such as arches and keystones. There were three major types of Roman bridge: wooden, pontoon, and stone. Early Roman bridges were wooden, but by the 2nd century stone was being used. Stone bridges used the arch as their basic structure, and most used concrete, the first use of this material in bridge-building.
Ashlar is finely dressed stone, either an individual stone that has been worked until squared, or a structure built from such stones. Ashlar is the finest stone masonry unit, generally rectangular cuboid, mentioned by Vitruvius as opus isodomum, or less frequently trapezoidal. Precisely cut "on all faces adjacent to those of other stones", ashlar is capable of very thin joints between blocks, and the visible face of the stone may be quarry-faced or feature a variety of treatments: tooled, smoothly polished or rendered with another material for decorative effect.
Soluntum or Solus was an ancient city on the Tyrrhenian coast of Sicily near present-day in the comune of Santa Flavia, Italy. The site is a major tourist attraction. The city was founded by the Phoenicians in the sixth century BC and was one of the three chief Phoenician settlements in Sicily in the archaic and classical periods. It was destroyed at the beginning of the fourth century BC and re-founded on its present site atop Monte Catalfano. At the end of the fourth century BC, Greek soldiers were settled there and in the 3rd century BC the city came under the control of the Roman Republic. Excavations took place in the 19th century and in the mid-20th century. Around half of the urban area has been uncovered and it is relatively well preserved. The remains provide a good example of an ancient city in which Greek, Roman and Punic traditions mixed.
Rusellae was an important ancient town of Etruria, which survived until the Middle Ages before being abandoned. The impressive archaeological remains lie near the modern frazione or village of Roselle in the comune of Grosseto.
Opus reticulatum is a facing used for concrete walls in Roman architecture from about the first century BCE to the early first century CE. They were built using small pyramid shaped tuff, a volcanic stone embedded into a concrete core. Reticulate work was also combined with a multitude of other building materials to provide polychrome colouring and other facings to form new techniques. Opus reticulatum was generally used in central and southern Italy with the exception being its rare appearance in Africa and Jericho. This was because of tuff's wider availability and ease of local transport in central Italy and Campania compared to other regions.
Opus sectile is a form of pietra dura popularized in the ancient and medieval Roman world where materials were cut and inlaid into walls and floors to make a picture or pattern. Common materials were marble, mother of pearl, and glass. The materials were cut in thin pieces, polished, then trimmed further according to a chosen pattern. Unlike tessellated mosaic techniques, where the placement of very small uniformly sized pieces forms a picture, opus sectile pieces are much larger and can be shaped to define large parts of the design.
Opus signinum is a building material used in ancient Rome. It is a form of Roman concrete, the main difference being the addition of small pieces of broken pot, including amphorae, tiles or brick, instead of other aggregates.
Carranque is a town in the Toledo province, Castile-La Mancha, Spain. It is located in the area of the province bordering the province of Madrid called the Alta Sagra.
Opus quadratum is an ancient Roman construction technique, in which squared blocks of stone of the same height were set in parallel courses, most often without the use of mortar. The Latin author Vitruvius describes the technique.
Mycobacterium africanum is a species of Mycobacterium that is most commonly found in West African countries, where it is estimated to cause up to 40% of pulmonary tuberculosis. The symptoms of infection resemble those of M. tuberculosis.
Opus vittatum, also called opus listatum, was an ancient Roman construction technique introduced at the beginning of the fourth century, made by parallel horizontal courses of tuff blocks alternated with bricks.
Opus incertum was an ancient Roman construction technique, using irregularly shaped and randomly placed uncut stones or fist-sized tuff blocks inserted in a core of opus caementicium.
Opus mixtum, or opus vagecum and opus compositum, was an ancient Roman construction technique. It can consist in a mix of opus reticulatum and at the angles and the sides of opus latericium. It can also consist of opus vittatum and opus testaceum. Opus mixtum was also used from the 4th to 6th centuries AD.
The House of the Surgeon is one of the most famous houses in the ancient Roman city of Pompeii and is named after ancient surgical instruments that were found there. Along with the rest of the city, it was buried and largely preserved under 4 to 6 m of volcanic ash and pumice in the eruption of Mount Vesuvius in AD 79.
Gnetum africanum is a vine gymnosperm species found natively throughout tropical Africa. Though bearing leaves, the genus Gnetum are gymnosperms, related to pine and other conifers.
The Aqua Anio Vetus was an ancient Roman aqueduct, and the second oldest after the Aqua Appia.
Opus isodomum is an ancient technique of wall construction with ashlars. It uses perfectly cut, completely regular squared stone blocks of equal height, and sometimes of the same length.
In architecture, the latin term opus ("work") is a word that generically indicates various techniques of constructing buildings that were in use in ancient Rome. Usually, the word opus is not used alone in building descriptions, but is paired with specific attributes whose purpose is to show precisely the building technique that was used.
The Aïn Doura Baths are a series of Roman-era ruins located in Dougga, Tunisia. The site contains ruins from a Roman bath dating to the 4th century, and is considered an important archaeological heritage site by the National Heritage Institute of Tunisia.
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