Expanded History
History of Italy
From antiquity to the modern era — the historical eras, key events, and narrative that shaped Italy.
Overview
Greeks settled in the southern tip of the Italian Peninsula in the eighth and seventh centuries B.C.; Etruscans, Romans, and others inhabited the central and northern mainland. The peninsula subsequently was unified under the Roman Republic. The neighboring islands also came under Roman control by the third century B.C.; by the first century A.D., the Roman Empire effectively dominated the Mediterranean world. After the collapse of the Roman Empire in the West in the fifth century A.D., the peninsula and islands were subjected to a series of invasions, and political unity was lost. Italy became an oft-changing succession of small states, principalities, and kingdoms, which fought among themselves and were subject to ambitions of foreign powers. Popes of Rome ruled central Italy; rivalries between the popes and the Holy Roman Emperors, who claimed Italy as their domain, often made the peninsula a battleground.
The commercial prosperity of northern and central Italian cities, beginning in the 11th century, and the influence of the Renaissance mitigated somewhat the effects of these medieval political rivalries. Although Italy declined after the 16th century, the Renaissance had strengthened the idea of a single Italian nationality. By the early 19th century, a nationalist movement developed and led to the reunification of Italy--except for Rome--in the 1860s. In 1861, Victor Emmanuel II of the House of Savoy was proclaimed King of Italy. Rome was incorporated in 1870. From 1870 until 1922, Italy was a constitutional monarchy with a parliament elected under limited suffrage.
20th-Century History
During World War I, Italy renounced its standing alliance with Germany and Austria-Hungary and, in 1915, entered the war on the side of the Allies. Under the postwar settlement, Italy received some former Austrian territory along the northeast frontier. In 1922, Benito Mussolini came to power and, over the next few years, eliminated political parties, curtailed personal liberties, and installed a fascist dictatorship termed the Corporate State. The king, with little or no effective power, remained titular head of state.
Italy allied with Germany and declared war on the United Kingdom and France in 1940. In 1941, Italy--with the other Axis powers, Germany and Japan--declared war on the United States and the Soviet Union. Following the Allied invasion of Sicily in 1943, the King dismissed Mussolini and appointed Marshal Pietro Badoglio as Premier. The Badoglio government declared war on Germany, which quickly occupied most of the country and freed Mussolini, who led a brief-lived regime in the north. An anti-fascist popular resistance movement grew during the last 2 years of the war, harassing German forces before they were driven out in April 1945. A 1946 plebiscite ended the monarchy, and a constituent assembly was elected to draw up plans for the republic.
Under the 1947 peace treaty, minor adjustments were made in Italy’s frontier with France, the eastern border area was transferred to Yugoslavia, and the area around the city of Trieste was designated a free territory. In 1954, the free territory, which had remained under the administration of U.S.-U.K. forces (Zone A, including the city of Trieste) and Yugoslav forces (Zone B), was divided between Italy and Yugoslavia, principally along the zonal boundary. This arrangement was made permanent by the Italian-Yugoslav Treaty of Osimo, ratified in 1977 (currently being discussed by Italy, Slovenia, and Croatia). Under the 1947 peace treaty, Italy also relinquished its overseas territories and certain Mediterranean islands.
The Roman Catholic Church’s status in Italy has been determined, since its temporal powers ended in 1870, by a series of accords with the Italian Government. Under the Lateran Pacts of 1929, which were confirmed by the present constitution, the state of Vatican City is recognized by Italy as an independent, sovereign entity. While preserving that recognition, in 1984, Italy and the Vatican updated several provisions of the 1929 accords. Included was the end of Roman Catholicism as Italy’s formal state religion.
Italy’s Cultural Contri
Historical Eras
The major periods of {country}’s history at a glance.
Ancient Italy
800 BCE – 476
Greek colonists established city-states across southern Italy while Etruscans dominated the north and center. Rome rose from a small republic to master of the Mediterranean world, unifying the peninsula and its islands by the third century BCE. At its height, the Roman Empire governed much of Europe, North Africa, and the Near East before collapsing under pressure from Germanic invasions in 476 CE.
Medieval Fragmentation
476 – 1000
The fall of the Western Roman Empire ushered in successive waves of invasion — Visigoths, Huns, Ostrogoths, and Lombards — dismantling Italian political unity. The papacy emerged as a major temporal power in central Italy, establishing the Papal States following Pepin the Short's donation in 756. Rivalry between popes and Holy Roman Emperors made the peninsula a persistent battleground, preventing consolidation under any single authority.
City-States & Renaissance
1000 – 1559
Commercial prosperity gave rise to powerful independent city-states — Florence, Venice, Milan, Genoa, and Naples — each developing distinct political and artistic cultures. The Renaissance, flowering from the 14th through 16th centuries, produced transformative achievements in art, architecture, literature, and humanism under patrons such as the Medici of Florence. The period closed with Spanish Habsburg dominance cemented by the Peace of Cateau-Cambrésis in 1559.
Foreign Domination
1559 – 1814
Spain, then Austria, exercised hegemony over much of the peninsula, reducing most Italian states to satellites of foreign powers. Napoleon's campaigns briefly reorganized Italy into client republics and kingdoms, and he declared himself emperor of the Italians in 1804, but his abdication in 1814 restored the fragmented patchwork of kingdoms and duchies. These upheavals nonetheless spread Enlightenment ideas and nationalist sentiment that would fuel the Risorgimento.
Risorgimento & Unification
1814 – 1870
A growing nationalist movement, driven by figures such as Giuseppe Mazzini, Count Cavour, and Giuseppe Garibaldi, sought to unite the fragmented Italian states against Austrian and papal authority. A series of wars and popular uprisings culminated in the proclamation of the Kingdom of Italy in 1861 under Victor Emmanuel II of the House of Savoy. Rome was incorporated in 1870 following the withdrawal of French troops, completing territorial unification.
Liberal & Fascist Kingdom
1870 – 1946
Unified Italy functioned as a constitutional monarchy with a gradually expanding parliamentary system, joining the Allies in World War I and gaining northeastern territories from Austria-Hungary. Economic hardship and political instability allowed Benito Mussolini to seize power in 1922, dismantling democratic institutions and establishing a fascist Corporate State allied with Nazi Germany. Defeat in World War II, Allied invasion in 1943, and liberation in 1945 led to a 1946 plebiscite that abolished the monarchy.
Italian Republic
1946 – present
A constituent assembly drafted a republican constitution enacted in 1948, anchoring Italy in parliamentary democracy and Western alliances including NATO and the founding European Economic Community. The postwar economic miracle transformed Italy into a major industrial nation, though political life was marked by frequent government changes, Cold War polarization, and the turbulence of the 1970s 'Years of Lead.' Italy remains a founding member of the European Union and one of the world's largest economies.
Timeline Preview
The first 7 key events. View the full chronology on the timeline page.
485
Italy was invaded by Attila the Hun
Italy was invaded by Attila the Hun. Pope Leo I dissuaded Attila from sacking Rome.
553
The old Roman Empire was reunited
The old Roman Empire was reunited by Justinian, the Byzantine emperor.
568
The Lombards invade Italy
The Lombards, a Germanic tribe, invade Italy which is divided into three regions ruled by the Lombards, the Eastern Roman Empire and the Papal States.
572
The Byzantine rule collapses after an attack by the Lombards
The Byzantine rule collapses after an attack by the Lombards.
756
Pepin the Short conquers the Lombards for the popes
Pepin the Short, a Frankish King, conquers the Lombards for the popes.
756
The Papal States were established in central Italy
The Papal States were established in central Italy.
774
The Lombards defeated by Charlemagne
The Lombards defeated by Charlemagne.

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