Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
Constantine the Great Follis
A bronze coin of Constantine the Great, the emperor who legalized Christianity and founded Constantinople, struck at numerous mints across a transforming empire.
Ancient
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
Constantius I Chlorus Follis
Reform-era bronze follis of Constantius I Chlorus, Caesar and later Augustus of the western Tetrarchy, remembered chiefly as the father of Constantine the Great.
Ancient
Constantine URBS ROMA Commemorative
A small bronze commemorative honoring the city of Rome with a helmeted Roma obverse and the iconic she-wolf suckling Romulus and Remus on the reverse.
Ancient
Byzantine Follis
The large bronze workhorse coin of everyday Byzantine commerce, reformed by Emperor Anastasius I in 498 AD with a prominent Greek numeral denoting its value of 40 nummi.
Ancient
Constantine CONSTANTINOPOLIS Commemorative
A small bronze commemorative celebrating the founding of Constantinople, showing Victory standing on a ship's prow on the reverse.
Ancient
Licinius Follis
Bronze follis of Licinius, the last rival emperor to challenge Constantine the Great before his defeat and the reunification of the Roman Empire under Constantinian rule in 324 AD.
Ancient
Valentinian I Solidus
A high-purity gold solidus of Valentinian I, founder of the Valentinianic dynasty, reflecting the stable gold standard established under Constantine.
Ancient
Theodosius I Solidus
A gold solidus of Theodosius I, the last emperor to rule a united Roman Empire and the ruler who made Nicene Christianity the state religion.
Ancient
Diocletian Follis
Large bronze follis of Diocletian, whose sweeping reforms ended the Crisis of the Third Century, established the Tetrarchy, and introduced this new standardized coin denomination in 294 AD.
Ancient
Galerius Follis
Reform-era bronze follis of Galerius, Caesar and later Augustus of the eastern Tetrarchy, remembered for early persecution of Christians and his later Edict of Toleration issued just before his death.
Ancient
Maximinus Thrax Denarius
Silver denarius of Maximinus Thrax, the first Roman emperor risen from the common soldiery rather than the senatorial class, ruling amid the onset of the Crisis of the Third Century.
Ancient
Laurel
A gold twenty-shilling coin issued from 1619, named for its laureate royal portrait styled after Roman emperors, replacing the earlier Unite as James I's principal gold denomination.
British
Roman Republic Denarius
The workhorse silver coin of the Roman Republic, introduced during the Second Punic War and struck by a long line of moneyers with ever-changing, often political, designs.
Ancient
Valerian Antoninianus
Radiate coin of Valerian, the only Roman emperor ever captured alive by a foreign enemy, taken prisoner by the Sassanid king Shapur I in 260 AD.
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
Peruvian Sol de Oro
Peru's long-running national currency unit, the Sol de Oro, was issued as coinage from the 1860s through the mid-1980s in both silver and later base-metal forms.
Latin American
Peruvian Libra de Oro (Gold Pound)
Peru's gold pound, modeled on the British sovereign's weight and fineness, was struck intermittently to support Peru's participation in the international gold standard.
Latin American
Byzantine Gold Tremissis
A small gold fractional coin worth one-third of a solidus, widely struck across the early Byzantine world and imitated by Germanic successor kingdoms in the former Western Roman Empire.
Ancient
Italian Scudo (Papal States)
A large silver coin issued by the Papal States under successive popes, blending religious imagery with the temporal authority of the papacy.
European
Constantius II Centenionalis
A bronze centenionalis of Constantius II featuring the dramatic 'Fallen Horseman' reverse, one of the most famous designs of the Late Roman Empire.
Ancient
Italian 100 Lire Gold
The largest gold denomination of the Kingdom of Italy's Latin Monetary Union coinage, struck under Vittorio Emanuele II and Umberto I in relatively limited numbers.
European
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
Austrian Thaler (Joseph II)
A silver thaler bearing the portrait of Holy Roman Emperor Joseph II, struck in the late 18th century and, like the more famous Maria Theresa thaler, later restruck for use in Levant and African trade.
European