The coinage of the Roman poet Gaius Valerius Flaccus between 69-90 AD primarily proclaims the power of the Flavian dynasty and the unity of the empire. The portraits of the emperors and the symbols of the Roman army and the empire often appear on the coins. In the year 69, the year of the four emperors, the coins of Flaccus depict the emperor Vespasian. The reverse of the coins often features the inscription "SPQR", i.e. "Senatus Populusque Romanus", i.e. "The Roman Senate and People". This inscription emphasizes the unity of the empire and the role of the senate. In the 1970s, Flaccus' coins continued to depict the emperor Vespasian. The inscription "CONCORDIA AVGVSTA", meaning "Unity of Augustus", often appears on the reverse of the coins. This inscription proclaims the peace and unity of the empire. In the 80s, coins of Flaccus depict the emperor Domitian. The inscription "PAX AVGVSTA", meaning "Peace of Augustus", often appears on the back of the coins. This inscription emphasizes the peace and prosperity of the empire. In the 90s, coins of Flaccus depict the emperor Domitian. The reverse of the coins often bears the inscription "VIRTVS AVGVSTA", meaning "Virtue of Augustus". This inscription glorifies the emperor's strength and wisdom. The coins of Flaccus are important historical documents that reflect the power of the Flavian dynasty and the unity of the empire.