A coin is a small object, usually round and flat, used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in large quantities at a mint in order to facilitate trade. They are most often issued by a government. Coins often have images, numerals, or text on them. The faces of coins or medals are sometimes called the obverse and the reverse, referring to the front and back sides, respectively. The obverse of a coin is commonly called heads, because it often depicts the head of a prominent person, and the reverse is known as tails.
The denarius was the standard Roman silver coin from its introduction in the Second Punic War c. 211 BC to the reign of Gordian III, when it was gradually replaced by the antoninianus. It continued to be minted in very small quantities, likely for ceremonial purposes, until and through the Tetrarchy (293–313).
The standard circulating coinage of the United Kingdom, British Crown Dependencies and British Overseas Territories is denominated in pennies and pounds sterling, and ranges in value from one penny sterling to two pounds. Since decimalisation, on 15 February 1971, the pound has been divided into 100 (new) pence. Before decimalisation, twelve pence made a shilling, and twenty shillings made a pound.
In economics, Gresham's law is a monetary principle stating that "bad money drives out good". For example, if there are two forms of commodity money in circulation, which are accepted by law as having similar face value, the more valuable commodity will gradually disappear from circulation.
The sestertius or sesterce was an ancient Roman coin. During the Roman Republic it was a small, silver coin issued only on rare occasions. During the Roman Empire it was a large brass coin.
Roman currency for most of Roman history consisted of gold, silver, bronze, orichalcum and copper coinage. From its introduction during the Republic, in the third century BC, through Imperial times, Roman currency saw many changes in form, denomination, and composition. A feature was the inflationary debasement and replacement of coins over the centuries. Notable examples of this followed the reforms of Diocletian. This trend continued with Byzantine currency.
Byzantine currency, money used in the Eastern Roman Empire after the fall of the West, consisted of mainly two types of coins: gold solidi and hyperpyra and a variety of clearly valued bronze coins. By the 15th century, the currency was issued only in debased silver stavrata and minor copper coins with no gold issue.
The franc, also commonly distinguished as the French franc (FF), was a currency of France. Between 1360 and 1641, it was the name of coins worth 1 livre tournois and it remained in common parlance as a term for this amount of money. It was reintroduced in 1795. After two centuries of inflation, it was redenominated in 1960, with each new franc (NF) being worth 100 old francs. The NF designation was continued for a few years before the currency returned to being simply the franc. Many French residents, though, continued to quote prices of especially expensive items in terms of the old franc, up to and even after the introduction of the euro in 2002. The French franc was a commonly held international reserve currency of reference in the 19th and 20th centuries. Between 1998 and 2002, the conversion of francs to euros was carried out at a rate of 6.55957 francs to 1 euro.
The aureus was a gold coin of ancient Rome originally valued at 25 pure silver denarii. The aureus was regularly issued from the 1st century BC to the beginning of the 4th century AD, when it was replaced by the solidus. The aureus was about the same size as the denarius, but heavier.
Kuruş, also gurush, ersh, gersh, grush, grosha, and grosi, are all names for currency denominations in and around the territories formerly part of the Ottoman Empire. The variation in the name stems from the different languages it is used in and the different transcriptions into the Latin alphabet. In European languages, the kuruş was known as the piastre.
The piastre or piaster is any of a number of units of currency. The term originates from the Italian for "thin metal plate". The name was applied to Spanish and Hispanic American pieces of eight, or pesos, by Venetian traders in the Levant in the 16th century.
The siliqua is the modern name—given without any ancient evidence to confirm the designation—to small, thin, Roman silver coins produced in the 4th century and later. When the coins were in circulation, the Latin word siliqua was a unit of weight or value defined by one late Roman writer as one twenty-fourth of a Roman solidus.
"Siliqua vicesima quarta pars solidi est, ab arbore, cuius semen est, vocabulum tenens."
A siliqua is one twenty-fourth of a solidus, having its name from the tree of which it is the seed.
This glossary of numismatics is a list of definitions of terms and concepts relevant to numismatics and coin collecting, as well as sub-fields and related disciplines, with concise explanations for the beginner or professional.
The silver real was the currency of the Spanish colonies in America and the Philippines. In the seventeenth century the silver real was established at two billon reales or sixty-eight maravedíes. Gold escudos were also issued. The coins circulated throughout Spain's colonies and beyond, with the eight-real piece, known in English as the Spanish dollar, becoming an international standard and spawning, among other currencies, the United States dollar. A reform in 1737 set the silver real at two and half billon reales or eighty-five maravedís. This coin, called the real de plata fuerte, became the new standard, issued as coins until the early 19th century. The gold escudo was worth 16 reales de plata fuerte.
Silver coins are one of the oldest mass-produced form of coinage. Silver has been used as a coinage metal since the times of the Greeks; their silver drachmas were popular trade coins. The ancient Persians used silver coins between 612–330 BC. Before 1797, British pennies were made of silver.
The Venetian grosso is a silver coin first introduced in Venice in 1193 under doge Enrico Dandolo. It originally weighed 2.18 grams, was composed of 98.5% pure silver, and was valued at 26 denarii. Its name is from the same root as groschen and the English groat, all deriving ultimately from the denaro grosso.
The Great Recoinage of 1696 was an attempt by the English Government under King William III to replace the hammered silver that made up most of the coinage in circulation, much of it being clipped and badly worn.
The Great Debasement (1544–1551) was a currency debasement policy introduced in 1544 England under the order of Henry VIII which saw the amount of precious metal in gold and silver coins reduced and in some cases replaced entirely with cheaper base metals such as copper. Overspending by Henry VIII to pay for his lavish lifestyle and to fund foreign wars with France and Scotland are cited as reasons for the policy's introduction. The main aim of the policy was to increase revenue for the Crown at the cost of taxpayers through savings in currency production with less bullion being required to mint new coins. During debasement gold standards dropped from the previous standard of 23 karat to as low as 20 karat while silver was reduced from 92.5% sterling silver to just 25%. Revoked in 1551 by Edward VI, the policy's economic effects continued for many years until 1560 when all debased currency was removed from circulation.
A Münzfuß is an historical term, used especially in the Holy Roman Empire, for an official minting or coinage standard that determines how many coins of a given type were to be struck from a specified unit of weight of precious metal. The Münzfuß, or Fuß ("foot") for short in numismatics, determined a coin's fineness, i.e. how much of a precious metal it would contain. Mintmaster Julian Eberhard Volckmar Claus defined the standard in his 1753 work, Kurzgefaßte Anleitung zum Probieren und Münzen, as follows: "The appropriate proportion of metals and the weight of the coin, measured according to their internal and external worth, or determined according to their quality, additives and fineness, number and weight, is called the Münzfuß."
The Carolingian monetary system, also called the Carolingian coinage system or just the Carolingian system, was a currency structure introduced by Charlemagne in the late 8th century as part of a major reform, the effects of which subsequently dominated much of Europe, including Britain, for centuries. It is characterised by having three denominations with values in the ratio 1:12:240, the units of which went under different names in the different languages, but which corresponded to the Latin terms libra (pound), solidus (shilling) and denarius (penny), respectively.
An unclipped siliqua
A clipped siliqua
A further clipped siliqua
