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Aes Grave
Aes Rude
The Age of Gallienus
Alexander Tetradrachms
Ancient Coin Collecting 101
Ancient Coin Prices 101
Ancient Coin Dates
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Ancient Coins & Modern Fakes
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Anonymous Folles
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Armenian Numismatics Page
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A Cabinet of Greek Coins
Caesarean and Actian Eras
Campgates of Constantine
A Case of Counterfeits
Byzantine Christian Themes
Clashed Dies
Coins of Pontius Pilate
Conditions of Manufacture
Corinth Coins and Cults
Countermarked in Late Antiquity
Danubian Celts
Damnatio Coinage
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Denarii of Otho
Diameter 101
Die Alignment 101
Dictionary of Roman Coins
Doug Smith's Ancient Coins
Edict on Prices
ERIC - Rarity Tables
Etruscan Alphabet
The Evolving Ancient Coin Market
Facing Portrait of Augustus
Fel Temp Reparatio
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Greek Mythology Link
Greek Numismatic Dictionary
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The Hexastyle Temple of Caligula
Historia Numorum
Horse Harnesses
Identifying Ancient Metal Arrowheads
Illustrated Ancient Coin Glossary
Important Collection Auctions
Islamic Rulers and Dynasties
Julian II: The Beard and the Bull
Kushan Coins
People in the Bible Who Issued Coins
Imperial Mints of Philip the Arab
Later Roman Coinage
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Library of Ancient Coinage
Life in Ancient Rome
List of Kings of Judea
Malloy Weapons
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Military Belts
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The [Not] Cuirassed Elephant
Not in RIC
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Numismatic French
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Parthian Coins
Patina 101
Paleo-Hebrew Alphabet
Phoenician Alphabet
Pi-Style Athens Tetradrachms
Pricing and Grading Roman Coins
Reading Judean Coins
Representations of Alexander the Great
Roman Coin Attribution 101
Roman Militaria
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Rome and China
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Serdi Celts
The Sign that Changed the World
Silver Content of Parthian Drachms
Star of Bethlehem Coins
Statuary Coins
Sylloge Nummorum Graecorum
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Taras Drachms with Owl Left
The Temple Tax
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Travels of Paul
Tribute Penny
Tribute Penny Debate Continued (2015)
Tribute Penny Debate Revisited (2006)
Tyrian Shekels
Uncleaned Ancient Coins 101
Venus Cloacina
What I Like About Ancient Coins
Who was Trajan Decius
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Please add updates or make corrections to the NumisWiki text version as appropriate.
XX, 20 sesterces - on the first gold coins struck for the Roman republic at Capua in 217 BC. Other marks of value found on these coins are [anchor, flukes down]X 60 sesterces and XXXX 40 sesterces.

XX, as a mark of value on the copper coins of the Ostrogoths without name of king.

XX Vicennales (?) - PRIMI XX IOVI AVGVSTI (sic IOVII) - on a rare gold coin of Diocletian.

XX (Vicennalia ?) - DIOLETIANI AVG or MAXIMIANI AVG, within a laureal wreath, on gold coins of Diocletian and Maximian Hercules.

XX Vicennalibus - VOT XV FEL XX OR VOT XV MVLT XX, VOT XX SIC OR MVLT XXX, etc. See X Decennalibus

XX Viscesima, Vicesimo, Vicesimum, and similarily with the compounds of XX up to XXIX or XXVIIII. See X Decimum

XX, within a laurel wreath; in the exergue, AQ (Aquiliae) or CONST (Constantinae - Arles), or LVG (Lugduno). Obverse CAESAR, head of Constantius Gallus to right, bare head. Silver medallion. Froehner suggests that the XX on these medallions indicates the value of the peces of which the weight equalled 1/24th of the silver pound.

XX - PXXT, SXXT, TXXT, QXXT, VXXT, VIXXT. Prima, Secunda, Tertia, Quarta, quinta, Sexta, XX Tarracone - on coins of Aurelian and Probus. "On the accession of Aurelian (AD 270-275) to the throne heattempted to remedy the disordered state of the coinage, and to restore it from its degraded state under Gallienus. His first object was to put to an end to the continual fluctuations in the price of gold, caused by the quantity of base money which was issued from the imperial mint. To effect this with as little injury as possible, he reduced the base denarii in circulation to the rate at which they then circulated, which appears to have been 500 or 525 to an aureus, and consequently issued from the mint pieces equal to 20 or 21 of these copper denarii as equivalent to a denarius of account. The weight of the common copper and pated coins of Aurelian and his successors, which have XX and XXI in the exergue, varies from 56 to 66 grains [3.63 to 4.28 grams], and consequently from 20 to 21 are equal to four of the large copper coins, or sesterces, of Severus Alexander and Gordian III." The numbers XX and XXI occur also on the coins of Probus, but the former was discontinued after his reign, whilst the latter occurs to the time of Constantine the Great. See VXXT, VXX, and Tarraco, Karthago.

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