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.
The solidus or nomisma was a highly pure gold coin issued in the Later Roman Empire and Byzantine Empire. The early 4th century saw the solidus introduced in mintage as a successor to the aureus, which was permanently replaced thereafter by the new coin, whose weight of about 4.5 grams remained relatively constant for seven centuries.
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.
The ducat coin was used as a trade coin in Europe from the later Middle Ages to the 19th century. Its most familiar version, the gold ducat or sequin containing around 3.5 grams of 98.6% fine gold, originated in Venice in 1284 and gained wide international acceptance over the centuries. Similarly named silver ducatons also existed. The gold ducat circulated along with the Florentine florin and preceded both the modern British pound sterling and the United States dollar.
In the Middle Ages, the term bezant was used in Western Europe to describe several gold coins of the east, all derived ultimately from the Roman solidus. The word itself comes from the Greek Byzantion, the ancient name of Constantinople, the capital of the Byzantine Empire.
The hyperpyron was a Byzantine coin in use during the late Middle Ages, replacing the solidus as the Byzantine Empire's standard gold coinage in the 11th century. It was introduced by emperor Alexios I Komnenos.
Histamenon was the name given to the gold Byzantine solidus when the slightly lighter tetarteron was introduced in the 960s. To distinguish the two, the histamenon was changed in form from the original solidus, becoming wider and thinner, as well as concave (scyphate) in form. Later usually shortened to stamenon, it was discontinued after 1092. In the 12th and 13th centuries, the name stamenon came to be applied to the concave billon and copper trachea coins.
The Byzantine economy was among the most robust economies in the Mediterranean for many centuries. Constantinople was a prime hub in a trading network that at various times extended across nearly all of Eurasia and North Africa. Some scholars argue that, up until the arrival of the Arabs in the 7th century, the Eastern Roman Empire had the most powerful economy in the world. The Arab conquests, however, would represent a substantial reversal of fortunes contributing to a period of decline and stagnation. Constantine V's reforms marked the beginning of a revival that continued until 1204. From the 10th century until the end of the 12th, the Byzantine Empire projected an image of luxury, and the travelers were impressed by the wealth accumulated in the capital. All this changed with the arrival of the Fourth Crusade, which was an economic catastrophe. The Palaiologoi tried to revive the economy, but the late Byzantine state would not gain full control of either the foreign or domestic economic forces.
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.
Medieval Bulgarian coinage were the coins minted by the Bulgarian Emperors during the Middle Ages at the time of the Second Bulgarian Empire.
The gold dinar is an Islamic medieval gold coin first issued in AH 77 (696–697 CE) by Caliph Abd al-Malik ibn Marwan. The weight of the dinar is 1 mithqal.
Nummus is a Latin word for various coins that was borrowed from Doric Greek noummos. Originally referring to a specific style of coin used in Greek-speaking Southern Italy, the term nummus came to be used by the Late Republic for all coins generally and particularly as a synonym for the sestertius, then the standard unit of Roman accounting, and then in Late Antiquity as the formal name of the follis. It was used in this general sense in Early Modern English but is most commonly employed by modern numismatists as a catchall term for various low-value copper coins issued by the Roman and Byzantine empires during Late Antiquity.
The coinage of the Visigoths was minted in Gaul and Hispania during the early Middle Ages, between the fifth century and approximately 710.
The miliaresion, is a name used for two types of Byzantine silver coins. In its most usual sense, it refers to the themed flat silver coin struck between the 8th and 11th Century.
The stavraton or stauraton was a type of silver coin used during the last century of the Byzantine Empire.
The basilikon, commonly also referred to as the doukaton, was a widely circulated Byzantine silver coin of the first half of the 14th century. Its introduction marked the return to a wide-scale use of silver coinage in the Byzantine Empire, and presaged the total abandonment of the gold coins around the middle of the century.
The tetarteron was a Byzantine term applied to two different coins, one gold circulating from the 960s to 1092 in parallel to the histamenon, and one copper used from 1092 to the second half of the 13th century.
The politikon coinage is a series of Byzantine billon coins, struck around the middle of the 14th century, which are distinguished by the Greek inscription +ΠΟΛΙΤΙΚΟΝ.
Scyphate is a term frequently used in numismatics to refer to the concave or "cup-shaped" Byzantine coins of the 11th–14th centuries.
The Lombard coinage of Benevento, part of the more general Lombard coinage, is the set of coins minted between about 680 and the end of the ninth century in the duchy and principality of Benevento. Solidi and tremisses, both gold coins that imitated those of the Eastern Roman Empire, were first minted; later followed the issuance of coins in the names first of the dukes and then of the Benevento princes. Toward the end of the 8th century alongside the gold coins were minted silver coins, which gradually took the place of the earlier ones, as moreover happened in the rest of Western Europe. Silver became the prevalent coinage metal only from the mid-9th century.
