http://www.romancoins.info/
This museum features a portrait gallery of Roman emperors and their
families from the late Roman republic to the end of the western Roman Empire,
both on coins and sculpture. Pieces of art in marble and metal. In addition
you will find historically interesting coins; countermarks on Roman coins;
legionary stamps on Roman bricks; Roman military diploma; Roman military
equipment; officials, provinces, buildings, animals, gods & mintmarks
on Roman coins
http://www.jkerncoins.com/main.htm
Coins grouped by historical periods - I volti di Augusto, Rassegne tematiche
(file pdf - tempi di download lunghi).