David Vagi is an acknowledged authority on ancient coins. He helped coordinate the creation of one of the world's largest grading services evaluating and authenticating Greek and Roman coins. He is a sought after speaker at numismatic conventions. Learn about the first twelve Roman Caesars including Julius Caesar, Augustus, Tiberius, Caligula, Claudius, Nero and the others who have become part of history. Discover how easy it is to collect these and other ancient coins.