The term "aureus" refers to a gold coin that was used in ancient Rome. It was made of high-quality gold and was typically worth 25 silver denarii. The aureus played a significant role in trade and commerce during the Roman Empire, symbolizing wealth and power. In addition to its monetary value, the aureus often featured images of emperors and deities, showcasing the artistry of Roman coinage. Collectors and historians today study these coins to gain insights into Roman history, economics, and art, making the aureus an important artifact of ancient civilization.