BIBLIOGRAPHY
Tulane University lecture materials, "Roman Currency of the Principate".
Tulane University (archived version from the Wayback Machine).

Claims Supported by This Source
- In 23 BC, the bronze coinage was reformed: 1 aureus = 25 denarii = 100 sestertii (brass) = 400 asses (copper). Large sums were counted in sestertii.
- From 46 BC to 84 AD, the annual pay for a legionary was 225 denarii (10 asses per day). Domitian raised it to 300 denarii.
- In AD 64, gold coins were struck at 45 to the pound, and denarii at 96 to the pound.
- The antoninianus of 215 weighed 5.1 g, had 52% silver content, and contained 80% of the silver of two denarii.
- Silver content: Gallienus, 265-66: 9%; 267-68: 6%. Claudius II, 268: 3%. Aurelian, 274: 5%.
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