Roman Italy (c. 600-31 BC)
Rome, a frontier town between the Etruscans and Latins, began expanding around 600 BC, driven by a coalition of Latin and Sabine communities. The Tarquins, an Etruscan dynasty, oversaw early growth, but in 509 BC the Romans expelled the Etruscan monarchy and established a republic, ruled by two annually elected consuls. A class struggle led to the Law of the Twelve Tables (c. 450 BC), granting legal equality between patricians and plebeians.
With internal stability, Rome began conquering the northern peninsula. After the fall of Veii in 396 BC, they seized towns like Sutri and Nepi — what Livy called the “barriers and gateways of Etruria.” Though briefly overrun by Gauls in 390 BC, who ransomed the city, Rome rebounded, eventually defeating the Samnites and taking Campania and Puglia. In the south, they confronted Greek colonies like Tarentum, whose plea to Pyrrhus of Epirus led to a costly war. After his defeat at Beneventum in 275 BC, Rome controlled most of southern Italy.
In 264 BC, Rome entered the First Punic War after aiding the Mamertines of Messina against Carthage. They gained Sicily, Sardinia, and Corsica. Victory over the Gauls in 222 BC secured control of the entire peninsula.
The Second Punic War followed. Hannibal crossed the Alps and crushed Roman legions at Lake Trasimeno and Cannae (216 BC), but halted at Capua. Rome’s response, led by Scipio, focused on Spain and then North Africa. Though Carthage fell decades later, Rome also conquered Macedonian Greece during this period.
These conquests brought wealth to Roman elites, deepening social divides. The senatorial class resisted reforms by the popular party, including those of Gaius Gracchus, who was assassinated. With reform blocked, many sought power through the army. General Marius gained influence but was outmaneuvered by Sulla, who seized power, purged rivals, and rewarded his troops with confiscated land — much of it wasted. A major revolt led by Spartacus in 73 BC was suppressed after two years.
Julius Caesar and Augustus (60-27 BC)
After Sulla’s death, Pompey and Crassus took power, later forming the First Triumvirate with Julius Caesar in 60 BC. Caesar became consul in 59 BC and spent eight years campaigning in Gaul. His growing power alarmed Pompey, and in 49 BC, Caesar crossed the Rubicon, defying the Senate. With no resistance in Rome, he assumed control.
Over the next four years, Caesar pursued civil reforms and defeated Pompey’s forces. In 44 BC, he was assassinated by senators, including Brutus. The Second Triumvirate — Octavian, Lepidus, and Mark Antony — emerged in 43 BC but quickly fractured. Antony, aligned with Cleopatra, clashed with Octavian, whose forces won at Actium in 31 BC. Antony committed suicide, leaving Octavian sole ruler.
Now styled Augustus Caesar, he launched reforms and public works while maintaining the modest title of “First Citizen,” establishing the Roman Empire.
The emperors (AD 14-193)
Tiberius (14-37) ruled capably, but decadence soon set in. Caligula’s erratic reign (37-41) was stabilized by the civil service. Claudius (41-54) conquered southern Britain and was succeeded by Nero (54-68), infamous for persecuting Christians. After Nero’s suicide, a chaotic year of four emperors ended with the Flavian dynasty — Vespasian, Titus, and Domitian — ushering in renewed stability.
The following Century of the Antonines — Nerva, Trajan, Hadrian, Antoninus Pius, and Marcus Aurelius — marked the empire’s peak. These rulers strengthened infrastructure and supported the arts, exemplified by the bronze equestrian statue of Marcus Aurelius.
Decline followed under Marcus Aurelius’s son Commodus (180-193), whose weak leadership and unstable successors saw military control wane and economic disparity grow. The agricultural south suffered while the north gained influence.
Barbarians and Byzantines (c. AD 200-600)
In the third century, invasions by Goths, Franks, and Alamanni signaled the empire’s decline. Aurelian (270-275) briefly restored order, and Diocletian (284-305) restructured the empire, doubling the army and splitting it into eastern and western halves. He ruled the west from Milan and persecuted Christians, many of whom became saints.
Christianity rose under Constantine (306-337), who declared it the state religion and founded Constantinople. As the capital shifted east, Rome declined, and feudal patterns began emerging.
Barbarians entered the empire in AD 376, driven by Huns from the east. Visigoths crossed the border and settled. As confidence in the empire eroded, many elites stopped supporting it. By the early fifth century, barbarian generals held high command posts, and loyalty crumbled.
On New Year’s Eve 406, Vandals, Alans, and Sueves crossed the frozen Rhine into Gaul. In 410, Alaric sacked Rome, prompting Saint Jerome’s famous lament: “When the whole world perished in one city, then I was dumb with silence.”
Rome's western empire collapsed after Valentinian III’s assassination in 455. His weak successors were ignored by the Germanic troops, who elected their general Odoacer king. The eastern emperor Zeno opposed him and in 487 encouraged Theodoric, leader of the Ostrogoths, to invade. By 493, Theodoric ruled Italy.
The Byzantine reconquest and the Church (AD 493-600)
Despite the collapse of Roman power, administration and Roman law continued under Ostrogothic rule. In the 530s, Eastern Emperor Justinian launched a campaign to reunify the empire. His general Belisarius captured Sicily in 536 and took the peninsula by 552. The Byzantines retained control in the south and Sardinia for the next five centuries.
During this period of weak central power and constant invasions, the Christian Church gained authority. With the emperor far away in Constantinople, the bishops of Rome emerged as leaders. Pope Leo I (440-461) justified papal primacy, asserting the pope’s right to rule all who were ruled first by Christ.
Amid this confusion, northern armies continued pressing into former imperial lands, shaping the political map of medieval Italy.