In Roman History by Cassius Dio, Marcus Agrippa emerges as one of the most important yet often understated figures in the rise of the Roman Empire and the consolidation of Augustus’s power. Writing in the early third century CE, Cassius Dio provides detailed accounts of Agrippa’s military leadership, highlighting his decisive role in victories such as the Battle of Actium (31 BCE), where his naval command helped defeat Mark Antony and Cleopatra VII. Dio also emphasizes Agrippa’s loyalty to Augustus (Octavian), portraying him as the emperor’s most trusted general, administrator, and political partner. Beyond warfare, Marcus Agrippa appears in Dio’s narrative as a key architect of Roman infrastructure and urban development, overseeing projects that transformed Rome’s public works, including aqueducts and monumental buildings. As a major literary source for the Augustan Age, Cassius Dio’s Roman History provides crucial insight into how Agrippa’s military strategy, political loyalty, and administrative skill helped secure the foundations of the early Roman Empire.

In Natural History, the encyclopedic work of Pliny the Elder, the Roman scholar preserves valuable information about Marcus Agrippa, the trusted general and son-in-law of Augustus. Pliny credits Agrippa with creating an important map of the Roman world, which was later displayed publicly in Rome, likely in the Porticus Vipsania begun by his sister Vipsania Polla. Drawing on Agrippa’s surveys and administrative records, Pliny the Elder incorporates geographic measurements of provinces, cities, and distances, making Agrippa’s geographic survey one of the most influential sources behind the geographical sections of Natural History. Through this transmission, Pliny’s Natural History preserves critical evidence of Roman cartography, imperial geography, and Augustan-era mapping projects, highlighting how Marcus Agrippa’s map helped shape Roman understanding of the Mediterranean world.

Strabo’s Geography is one of the most important surviving works of ancient geography, written by the Greek scholar Strabo in the early Roman Imperial period (late 1st century BCE to early 1st century CE). Comprising 17 books, the work provides a comprehensive description of the known world, including detailed accounts of Europe, Asia, and North Africa, blending geographical observation, historical analysis, and ethnographic descriptions. Drawing on earlier authorities such as Eratosthenes, Homer, and Herodotus, Strabo sought to create a practical geographical guide useful for Roman administrators, scholars, and statesmen. His descriptions of regions like Greece, Egypt, Italy, and Anatolia preserve valuable information about ancient cities, trade routes, and cultural traditions. Today, Strabo’s Geography remains a foundational source for understanding classical geography, the Roman world, and ancient perspectives on the structure of the inhabited earth (oikoumene).

In The Twelve Caesars by Suetonius, Marcus Agrippa appears as one of the most important allies and supporters of Augustus (Octavian) during the formation of the Roman Empire. Suetonius portrays Agrippa as a trusted general, administrator, and lifelong friend of Augustus, emphasizing his decisive military victories and loyal service. Most notably, Agrippa commanded the fleet that defeated Mark Antony and Cleopatra at the Battle of Actium (31 BCE), a victory that secured Augustus’ control of Rome. In the biography Life of Augustus, Suetonius also highlights Agrippa’s political influence, marriage into the Julio-Claudian dynasty, and his role in stabilizing the new imperial regime. Through these references, Suetonius’ Twelve Caesars presents Marcus Agrippa as a foundational figure in the rise of Augustan Rome, whose military leadership and administrative skill helped shape the early Roman imperial system.

In The Twelve Caesars by Suetonius, Marcus Agrippa appears as one of the most important allies and supporters of Augustus (Octavian) during the formation of the Roman Empire. Suetonius portrays Agrippa as a trusted general, administrator, and lifelong friend of Augustus, emphasizing his decisive military victories and loyal service. Most notably, Agrippa commanded the fleet that defeated Mark Antony and Cleopatra at the Battle of Actium (31 BCE), a victory that secured Augustus’ control of Rome. In the biography Life of Augustus, Suetonius also highlights Agrippa’s political influence, marriage into the Julio-Claudian dynasty, and his role in stabilizing the new imperial regime. Through these references, Suetonius’ Twelve Caesars presents Marcus Agrippa as a foundational figure in the rise of Augustan Rome, whose military leadership and administrative skill helped shape the early Roman imperial system.