Marcus Agrippa

Marcus Vipsanius Agrippa was born in 63 BCE, the same year that Cicero held the consulship and the year of the birth of Gaius Octavius, the future Augustus ^[1]. Later tradition placed his birth in Istria, at the northern edge of the Adriatic, though the family's origins remain obscure ^[2]. The Vipsanii held no consulships and no place among the old senatorial houses. Agrippa himself is said to have avoided using the family name, preferring to be known simply as Marcus Agrippa, perhaps because the obscure gentilicium invited mockery from better-born rivals ^[1].

Almost nothing is recorded of his childhood. He had an elder brother, Lucius, who fought on the losing side against Julius Caesar in Africa, and a sister, Vipsania Polla, who later appears in connection with his public works in Rome ^[2]. What mattered for his future was a schoolroom friendship: at some point in his youth Agrippa was educated alongside Octavius, Caesar's great-nephew. The two boys were together at Apollonia, on the coast of modern Albania, completing their studies and military training with the legions in March of 44 BCE when word arrived that Caesar had been assassinated in Rome ^[1].

Agrippa was among the small circle who advised the eighteen-year-old heir in those first uncertain days. Some urged Octavius to raise the eastern legions immediately; others counselled caution. Octavius chose to cross to Italy quietly and claim his inheritance by law before claiming it by arms, and Agrippa went with him ^[3]. From that crossing until his death thirty-two years later, his career and the career of the man who became Augustus were never separated.

The wars that followed Caesar's murder gave Agrippa his education in command. He served in the campaign against Brutus and Cassius that ended at Philippi in 42 BCE, then returned to Italy, where the settlement of veterans on confiscated land provoked a new conflict. When Lucius Antonius, the brother of Mark Antony, raised Italy against Octavian in 41 BCE, Agrippa was one of the commanders who penned the rebels inside the hill town of Perusia and starved them into surrender the following winter ^[3].

Rewards came quickly for a man of no family. Agrippa held the urban praetorship in 40 BCE and then a command in Gaul, where he put down a rising in Aquitania and led Roman troops across the Rhine, only the second commander after Julius Caesar to do so ^[2]. In 37 BCE, aged about twenty-six, he became consul, an office his ancestors could never have approached ^[1].

His greatest early service was fought on water. Sextus Pompeius, son of Pompey the Great, controlled Sicily and used his fleets to throttle the grain shipments on which Rome depended. After Octavian's navy was wrecked in battle and storm, Agrippa took charge of rebuilding it from nothing. He cut a channel linking Lake Avernus and Lake Lucrinus to the sea near Cumae, creating a sheltered harbor complex called the Portus Julius where crews could be trained in secret ^[4]. He also developed the harpax, a grapnel shot from a catapult that let his ships seize and hold enemy vessels ^[4]. In 36 BCE the new fleet destroyed Sextus Pompeius at Naulochus off the Sicilian coast, ending the blockade. The grateful Octavian awarded Agrippa a golden crown decorated with ships' beaks, a naval honor without precedent ^[3].

Anyone asking who was Marcus Agrippa usually meets him first at Actium. When the alliance between Octavian and Mark Antony finally collapsed, the war was decided at sea, and the sea belonged to Agrippa. Through the spring and summer of 31 BCE he captured the supply stations along the western Greek coast, including Methone and Leucas, cutting Antony's fleet off from Egypt while Octavian's army camped opposite the enemy position on the Gulf of Ambracia ^[3]. On 2 September 31 BCE the fleets met off the promontory of Actium. Agrippa commanded the seaward wing, and when Cleopatra's squadron broke through and fled south with Antony following, the remaining Antonian ships surrendered or burned. The battle left Octavian sole master of the Roman world ^[1].

Agrippa's other war was fought with brick, water, and stone. Unusually for a former consul, he accepted the lower office of aedile in 33 BCE and used it to overhaul the city of Rome: he repaired the old aqueducts, built a new one called the Aqua Julia, cleaned the Cloaca Maxima sewer (reportedly touring it by boat), and distributed olive oil and salt to the population ^[4]. As a permanent legacy he organized a trained workforce of slaves to maintain the water system, a body he later bequeathed to the state ^[4].

After Actium the building continued on a grander scale in the Campus Martius. Agrippa laid out Rome's first great public baths, the Basilica of Neptune, gardens, and a stagnum or artificial lake, all supplied by another new aqueduct, the Aqua Virgo, completed in 19 BCE and still feeding the Trevi Fountain today ^[5]. Between 27 and 25 BCE he built the original Pantheon. That building burned in 80 CE, and the domed temple now standing was erected under Hadrian, yet Hadrian kept the old dedication, which is why the facade still reads M AGRIPPA L F COS TERTIVM FECIT: Marcus Agrippa, son of Lucius, consul for the third time, made this ^[5].

The settlement of 27 BCE turned Octavian into Augustus, and Agrippa's position shifted from lieutenant to something closer to co-ruler. He shared the consulship with Augustus in 28 and 27 BCE, and the two men jointly conducted a census and revised the roll of the Senate ^[1]. When Augustus fell gravely ill in 23 BCE, he handed his signet ring not to his young nephew Marcellus but to Agrippa, a gesture contemporaries read as marking his intended successor ^[3].

Formal powers followed. Agrippa received a grant of imperium covering the eastern provinces and later, in 18 BCE, the tribunician power, the constitutional core of the emperor's own authority, renewed again in 13 BCE ^[2]. No other Roman ever shared that power with Augustus during these years. From his eastern base, often at Mytilene or in Syria, he settled veterans, founded colonies, and cultivated client kings, including Herod of Judaea, whom he visited in 15 BCE, sacrificing at Jerusalem and winning unusual goodwill among the Jewish population ^[6].

The workload never narrowed to administration. Agrippa campaigned in Spain in 19 BCE, ending the long Cantabrian resistance in the northern mountains, a brutal war for which he pointedly declined a triumph ^[3]. In 13 BCE he moved to the Danube frontier against the Pannonians. He was also a writer and geographer: his commentaries recorded the measured distances of the empire, and the data underpinned a great public map of the world, the Porticus Vipsania, completed after his death by Augustus and displayed in Rome ^[7]. He published a pointed essay arguing that all Greek masterpieces of painting and sculpture should be public property rather than hidden in private villas ^[4].

Agrippa's marriages traced his rise. His first wife was Caecilia Attica, daughter of Cicero's wealthy friend Atticus; their daughter Vipsania Agrippina became the first wife of the future emperor Tiberius ^[2]. Around 28 BCE he married Claudia Marcella, a niece of Augustus. Then in 21 BCE the emperor asked him to divorce Marcella and marry Julia, Augustus's only child, recently widowed at eighteen by the death of Marcellus ^[1].

The marriage to Julia bound Agrippa into the dynasty and produced five children: Gaius Caesar, Lucius Caesar, Julia the Younger, Agrippina the Elder, and Agrippa Postumus, born after his father's death ^[2]. Augustus adopted the two eldest boys as his own sons and heirs in 17 BCE, so that the low-born Agrippa became, in law, the father of the next emperors. Both boys died young, and the succession eventually passed to Tiberius, but Agrippa's blood still reached the throne: his daughter Agrippina married Germanicus and was the mother of the emperor Caligula, and through her daughter he was the great-grandfather of Nero ^[1].

Ancient writers agree on the outline of his character even when they disagree about his motives. He was frugal, physically tough, indifferent to luxury, and famously loyal. Pliny the Elder called him a man closer to rustic plainness than to refinement, yet credited him with more useful works for the Roman people than any private citizen had ever built ^[4]. His refusal of triumphs, three times offered and three times declined, was read by Cassius Dio as deliberate policy: honors belonged to Augustus, results belonged to Agrippa ^[3].

The final decade of Agrippa's life alternated between the frontiers and the family. After his eastern command ended in 13 BCE he returned to Rome, then left almost immediately for Pannonia, where trouble on the middle Danube demanded a commander of the first rank. The campaign was cut short. Falling ill in the winter, he crossed back to Italy and died in Campania in March of 12 BCE, in his fifty-first year ^[1].

Augustus, hurrying from Rome, arrived too late to see him alive. The emperor delivered the funeral oration himself; a fragment of the speech, preserved on papyrus, records the extraordinary legal powers Agrippa had held ^[2]. Although Agrippa had built his own tomb, Augustus buried him instead in the imperial Mausoleum on the Campus Martius, the clearest possible statement that he had died a member of the ruling house ^[3].

His will matched his public style. He left gardens and his baths to the people of Rome for free use, and property to Augustus, who passed much of it on in public distributions ^[3]. Games were held in his memory, and Augustus required mourning even from those inclined to slight the dead man's modest origins.

Few careers in Roman history repay study as directly as this one, and the essential Marcus Agrippa facts explain why. He won the naval battles, Naulochus and Actium, that decided who would rule Rome. He gave the capital its first comprehensive water and bathing infrastructure, and the office he created to maintain the aqueducts still operated generations later, described in detail by the water commissioner Frontinus around 97 CE ^[8]. His name remains on the Pantheon, one of the most visited ancient buildings in the world, and his Aqua Virgo still delivers water across Rome after two thousand years ^[5].

Historians have often treated the list of Marcus Agrippa achievements as inseparable from the achievement of Augustus itself. Meyer Reinhold, who wrote the first full modern biography in 1933, and later scholars such as Jean-Michel Roddaz and Lindsay Powell have argued that the Augustan system worked because Agrippa supplied the military competence, engineering energy, and personal restraint that the emperor could trust absolutely ^[2]. A man of his talent might have contested supreme power; instead he institutionalized the role of loyal deputy, sharing tribunician power without ever grasping for the name of ruler.

The dynastic consequences outlasted him. Every Julio-Claudian emperor after Tiberius descended from or married into his line, and the coins, inscriptions, and colonies bearing his name spread from Spain to the Black Sea. The city of Cologne began as a settlement of the Ubii, a people he moved across the Rhine, and it was later named in part for his granddaughter Agrippina ^[1]. For a man whose family name embarrassed him as a boy, it was a considerable revenge on the Roman aristocracy.