Corinthian bronze, also named Corinthian brass, aes Corinthiacum, or Grilver was a

metal A metal () is a material that, when polished or fractured, shows a lustrous appearance, and conducts electrical resistivity and conductivity, electricity and thermal conductivity, heat relatively well. These properties are all associated wit ...

alloy An alloy is a mixture of chemical elements of which in most cases at least one is a metal, metallic element, although it is also sometimes used for mixtures of elements; herein only metallic alloys are described. Metallic alloys often have prop ...

classical antiquity Classical antiquity, also known as the classical era, classical period, classical age, or simply antiquity, is the period of cultural History of Europe, European history between the 8th century BC and the 5th century AD comprising the inter ...

. It is thought to be an alloy of

copper Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...

with

gold Gold is a chemical element; it has chemical symbol Au (from Latin ) and atomic number 79. In its pure form, it is a brightness, bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal ...

silver Silver is a chemical element; it has Symbol (chemistry), symbol Ag () and atomic number 47. A soft, whitish-gray, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. ...

(or both), although it has also been contended that it was simply a very high grade of

bronze Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloid ...

, or a kind of bronze that was manufactured in

Corinth Corinth ( ; , ) is a municipality in Corinthia in Greece. The successor to the ancient Corinth, ancient city of Corinth, it is a former municipality in Corinthia, Peloponnese (region), Peloponnese, which is located in south-central Greece. Sin ...

. It is referred to in various ancient texts, but no certain examples of Corinthian bronze exist today. However, it has been increasingly suggested that a number of artefacts previously described as

niello Niello is a black mixture, usually of sulphur, copper, silver, and lead, used as an inlay on engraved or etched metal, especially silver. It is added as a powder or paste, then fired until it melts or at least softens, and flows or is push ...

in fact use a technique of

patina Patina ( or ) is a thin layer that variously forms on the surface of copper, brass, bronze, and similar metals and metal alloys ( tarnish produced by oxidation or other chemical processes), or certain stones and wooden furniture (sheen prod ...

ted metal that may be the same as Corinthian bronze and is similar to the Japanese shakudō. Its composition was long a mystery, but contemporary thinking is that Corinthian bronze was "a patinated alloy of copper with some gold and silver", perhaps the same as the ''hesmen kem'' or "black copper" of Ancient Egyptian art. This is shown by ancient texts to be a prestigious material, and apparently survives in a number of statuettes of "distinctive black-patinated, inlaid metal", of which scientific analysis shows "that some have a highly unusual composition containing small amounts of gold, silver and arsenic in the alloy", and are broadly similar to shakudō.Craddock

Classical antiquity

Of the known types of bronze or

brass Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, but copper typically has the larger proportion, generally copper and zinc. I ...

, not distinguished in classical antiquity and interchangeably known in

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

as ''aes'' and in

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

as χαλκός, Corinthian bronze was the most valuable. Statues, vases and vessels, or other objects formed of this metal were priceless, of greater value than if they had been made of silver or gold. Brewer, E. Cobham.
Corinthian Brass
" '' Dictionary of Phrase & Fable.'' 1898.

Pliny the Elder Gaius Plinius Secundus (AD 23/24 79), known in English as Pliny the Elder ( ), was a Roman Empire, Roman author, Natural history, naturalist, and naval and army commander of the early Roman Empire, and a friend of the Roman emperor, emperor Vesp ...

distinguished it into three kinds, depending on the metal that is added to the copper base: in the first, gold is added ('' luteum''); in the second, silver ('' candidum''); in the third, gold, silver, and copper are equally blended.Pliny's chapter on Corinthian Brass
from ''

Natural History Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is cal ...

''. English translation.

Plutarch Plutarch (; , ''Ploútarchos'', ; – 120s) was a Greek Middle Platonist philosopher, historian, biographer, essayist, and priest at the Temple of Apollo (Delphi), Temple of Apollo in Delphi. He is known primarily for his ''Parallel Lives'', ...

and

Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, orator, writer and Academic skeptic, who tried to uphold optimate principles during the political crises tha ...

both comment that Corinthian bronze, unlike many other copper alloys, is resistant to tarnishing. Pliny also refers to a fourth, dark alloy, known as hepatizon.

Petronius Gaius Petronius Arbiter"Gaius Petronius Arbiter"
Britannica.com. (; ; ; s ...

and other authors mocked the connoisseurs of their day who claimed to be able to identify it. According to legend, Corinthian bronze was first created by accident, during the burning of Corinth by

Lucius Mummius Achaicus Lucius Mummius (2nd century BC) was a Roman Republic, Roman statesman and general. He was consul in the year 146 BC along with Gnaeus Cornelius Lentulus (consul 146 BC), Gnaeus Cornelius Lentulus. Mummius was the first of his family to rise to ...

in 146 BC, when the city's immense quantities of gold, silver, and copper melted together. Pliny however, remarked that this story is unbelievable, because most of the creators of the highly valued works in Corinthian bronze in

Ancient Greece Ancient Greece () was a northeastern Mediterranean civilization, existing from the Greek Dark Ages of the 12th–9th centuries BC to the end of classical antiquity (), that comprised a loose collection of culturally and linguistically r ...

lived at a much earlier period than second century BC. According to Pliny, the method of making it had been lost for a long time,Yeo, Richard (1999). "Brass", p. 435 in '' The Edinburgh Encyclopedia''. . although some sources describe the process by which it is created, involving

heat treatment Heat treating (or heat treatment) is a group of industrial, thermal and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. The most common application is metallurgical. Heat treatments are a ...

quenching In materials science, quenching is the rapid cooling of a workpiece in water, gas, oil, polymer, air, or other fluids to obtain certain material properties. A type of heat treating, quenching prevents undesired low-temperature processes, suc ...

, leaching, and burnishing, in a process similar to depletion gilding. The lost ability to give an object made from bronze the appearance of gold or silver may be one strand behind the later alchemical quest to turn

base metal A base metal is a common and inexpensive metal, as opposed to a precious metal such as gold or silver. In numismatics, coins often derived their value from the precious metal content; however, base metals have also been used in coins in the past ...

s into

precious metal Precious metals are rare, naturally occurring metallic chemical elements of high Value (economics), economic value. Precious metals, particularly the noble metals, are more corrosion resistant and less reactivity (chemistry), chemically reac ...

Outside classical antiquity

Articles made of Corinthian bronze are mentioned in the

Bible The Bible is a collection of religious texts that are central to Christianity and Judaism, and esteemed in other Abrahamic religions such as Islam. The Bible is an anthology (a compilation of texts of a variety of forms) originally writt ...

. The Beautiful Gate (or Nicanor Gate) of the

Second Temple The Second Temple () was the Temple in Jerusalem that replaced Solomon's Temple, which was destroyed during the Siege of Jerusalem (587 BC), Babylonian siege of Jerusalem in 587 BCE. It was constructed around 516 BCE and later enhanced by Herod ...

Jerusalem Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean Sea, Mediterranean and the Dead Sea. It is one of the List of oldest continuously inhabited cities, oldest cities in the world, and ...

, mentioned in the

Book of Acts The Acts of the Apostles (, ''Práxeis Apostólōn''; ) is the fifth book of the New Testament; it tells of the founding of the Christian Church and the spread of The gospel, its message to the Roman Empire. Acts and the Gospel of Luke make u ...

3:2–10, was a large, 18 metre (60 feet) wide structure said to be either solid, or covered in plates of, Corinthian brass. Another Biblical reference, in

Book of Ezra The Book of Ezra is a book of the Hebrew Bible which formerly included the Book of Nehemiah in a single book, commonly distinguished in scholarship as Ezra–Nehemiah. The two became separated with the first printed Mikraot Gedolot, rabbinic bib ...

8:27, is usually translated "fine copper r bronze precious as gold". Similar alloys are found outside Europe. The Hông-hee vases (1426) of China were said to be made of a similarly mixed metal allegedly formed when the Imperial palace was burnt to the ground. These vessels are of priceless value. An alloy of gold and copper, known as tumbaga was in widespread use in

Pre-columbian In the history of the Americas, the pre-Columbian era, also known as the pre-contact era, or as the pre-Cabraline era specifically in Brazil, spans from the initial peopling of the Americas in the Upper Paleolithic to the onset of European col ...

Mesoamerica Mesoamerica is a historical region and cultural area that begins in the southern part of North America and extends to the Pacific coast of Central America, thus comprising the lands of central and southern Mexico, all of Belize, Guatemala, El S ...

, and has an essentially identical composition to Corinthian brass. A similar

metallurgical Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys. Metallurgy encompasses both the ...

process for "the colouration hrôsisof gold" is described in the 15th recipe in the

Leyden papyrus X The Leyden papyrus X (P. Leyden X) is a papyrus codex written in Greek at about the end of the 3rd century A.D.E.R.Caley, ''The Leyden Paprus X: An English Translation with Brief Notes''p.1149 "These two papyri have, however, upon the basis of unque ...

, from Thebes in

Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...

, dated to the 4th century AD.

Quotations

Notes

References

*Craddock, Paul and Giumlia-Mair, Allessandra, "Hsmn-Km, Corinthian bronze, Shakudo: black patinated bronze in the ancient world", Chapter 9 in ''Metal Plating and Patination: Cultural, technical and historical developments'', Ed. Susan La-Niece, 2013, Elsevier, {{ISBN, 1483292061, 9781483292069
P. T., "Metal" V. 4 and 5, ''Grove Art Online
'', Oxford Art Online. Oxford University Press. Web. 1 Oct. 2017
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