Links

Linked Open Data resources

nomisma.org
Online Coins of the Roman Empire (OCRE)
Coins of the Roman Republic Online (CRRO)

Coin Finds

Coin Hoards of the Roman Empire Project (CHRE, Oxford University)
Coin Hoards of the Roman Republic (CHRR)
AFE-RGK (Antike Fundmünzen in Europa, Römisch-Germanische Kommission, Frankfurt/Main)
AFE4HD (Antike Fundmünzen in Europa, Heidelberg University)
AFE-HU (Antike Fundmünzen in Europa, Elte University, Budapest)
Finds of Roman Coins from Poland (Antike Fundmünzen in Europa, Warsaw University)

Reference works

Roman Imperial Coinage AD 268-276 (RIC2 V.1 online)
Roman Provincial Coinage Online (RPC)

Collections

The American Numismatic Society
Münzkabinett – Staatliche Museen zu Berlin
British Museum