Roman coinage refers to the currency used in the ancient Roman Empire, which began around 300 BCE. Coins were made from various metals, including gold, silver, and bronze, and featured images of emperors, gods, and symbols of power. This system facilitated trade and commerce across the vast empire, allowing for easier transactions. The most common coins included the denarius, a silver coin that became the standard currency, and the sestertius, a larger bronze coin. Roman coins not only served as money but also as a means of propaganda, spreading the image and achievements of emperors throughout the empire.