The sestertius was a Roman coin used during the Roman Republic and the Roman Empire. Originally made of bronze, it was worth one-quarter of a denarius, another common Roman coin. The sestertius often featured images of emperors, gods, and important events, making it not only a medium of exchange but also a tool for propaganda.
Over time, the sestertius became larger and more ornate, especially during the reign of emperors like Augustus and Trajan. It played a significant role in trade and daily transactions, helping to facilitate the economy of ancient Rome. The coin's design and inscriptions provide valuable insights into Roman history and culture.