Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
Ides of March Denarius (EID MAR)
A denarius struck by Brutus in 42 BC commemorating Julius Caesar's assassination, showing daggers and a liberty cap — one of the most famous and valuable ancient coins ever made.
Ancient
Julius Caesar Elephant Denarius
One of the most widely recognized ancient Roman coins, struck under Julius Caesar's authority and depicting an elephant trampling a serpent, likely a symbolic image tied to Caesar's political struggles.
Ancient
Julius Caesar Portrait Denarius
A landmark Roman coin struck in 44 BC bearing the portrait of Julius Caesar during his lifetime, the first time a living Roman had appeared on state coinage.
Ancient
Brutus EID MAR Denarius
One of the most famous coins in existence, issued by Julius Caesar's assassin Brutus to commemorate the Ides of March, showing two daggers flanking a cap of liberty.
Ancient
Mark Antony Legionary Denarius
A widely produced denarius struck by Mark Antony to pay his legions before the Battle of Actium, each type naming a specific Roman legion on the reverse.
Ancient
Probus Antoninianus
Radiate coin of Probus, a capable soldier-emperor who defended the frontiers against Germanic incursions and issued coinage noted for elaborate consular and military portrait styles.
Ancient
Maximian Follis
Large bronze follis of Maximian, co-Augustus with Diocletian who ruled the western half of the empire as part of the Tetrarchy and shared the same reformed coinage design.
Ancient
Aureus of Augustus
The gold coin of Rome's first emperor, Augustus, who standardized the aureus at roughly 1/40 of a Roman pound and set the gold standard for the empire.
Ancient
Aurelian Antoninianus
Radiate coin of Aurelian, the soldier-emperor who reunited the fractured Roman Empire and enacted a major coinage reform introducing standardized silver content marked with XXI or KA.
Ancient
Aureus of Nero
The gold coin of Emperor Nero, whose AD 64 monetary reform reduced the aureus's weight standard alongside similar changes to the silver denarius.
Ancient
Philip the Arab Antoninianus
Radiate coin of Philip the Arab, notable for celebrating Rome's 1,000th anniversary in 248 AD with a memorable series of animal-themed 'Saecular Games' reverse types.
Ancient
Republican Quinarius
A half-denarius silver coin of the Roman Republic, often depicting the twin gods Castor and Pollux (the Dioscuri) riding on horseback.
Ancient
Postumus Antoninianus
Radiate coin of Postumus, the general who broke away from Rome to found the separatist Gallic Empire covering Gaul, Britain, Germania, and Hispania during the Crisis of the Third Century.
Ancient
Roman Aureus of Augustus
A gold coin struck under Rome's first emperor, Augustus, marking the establishment of a stable imperial gold coinage that funded and symbolized the new Roman Empire.
Ancient
Caracalla Antoninianus
The first antoninianus coins, introduced by Caracalla in 215 AD as a debased double-denarius identified by the emperor's radiate crown.
Ancient
Augustus Aureus Gaius and Lucius Caesar
One of the most common ancient gold coins, an Augustus aureus honoring his grandsons and intended heirs Gaius and Lucius Caesar, both of whom died young.
Ancient
Kushan Gold Dinar
Gold coin of the Kushan Empire modeled on the Roman aureus standard, notable for depicting a rich blend of Greek, Iranian, Indian, and Buddhist deities on its reverse.
Ancient
Canadian Loonie
Canada's eleven-sided one dollar coin, introduced in 1987 with a common loon on the reverse, giving rise to its popular nickname.
Canadian
1919-D Standing Liberty Quarter
A semi-key Denver-minted Standing Liberty quarter, scarcer than common dates of the series and notably difficult to find with a fully struck head.
United States
Constantine Sol Invictus Follis
A common bronze follis of Constantine the Great honoring Sol Invictus, the radiate sun god, struck empire-wide before his turn toward Christianity.
Ancient
Thebes Boeotian Shield Stater
A silver stater from Boeotia bearing the distinctive figure-eight-shaped Boeotian shield, the common civic emblem struck by Thebes and its allied cities for centuries.
Ancient
Brazilian 2000 Reis Silver
The largest common silver coin of the Brazilian Empire, bearing the portrait of Emperor Pedro II across several design types spanning his long reign.
Latin American
Brazilian 6400 Reis Gold (Peça)
A substantial colonial Brazilian gold coin nicknamed the "peça" (piece), widely known abroad as the "Johannes" or "Joe," and once common in trade across the Atlantic world.
Latin American
Netherlands East Indies VOC Duit
Copper coin struck by the Dutch East India Company (VOC) for circulation in its Asian trading territories, a common relic of 18th-century colonial commerce.
Asian