
TheItalian city-states were numerous political and independent territorial entities that existed in theItalian Peninsula from antiquity to the formation of theKingdom of Italy in the late 19th century.
The ancient Italiancity-states were Etruscan (Dodecapolis), Latin, most famouslyRome, and Greek (Magna Graecia), but also of Umbrian, Celtic and other origins. After thefall of the Western Roman Empire, urban settlements in Italy generally enjoyed a greatercontinuity than settlements in westernEurope. Many of these cities were survivors of earlier Etruscan, Umbrian and Roman towns which had existed within the Roman Empire. The republican institutions of Rome had also survived.
Somefeudal lords existed with a servile labour force and huge tracts of land, but by the 11th century, many cities, includingVenice,Milan,Florence,Genoa,Pisa,Lucca,Cremona,Siena,Città di Castello,Perugia, and many others, had become large trading metropoles, able to obtain independence from their formal sovereigns. Some of these cities grew in importance and becameduchies andmaritime empires.
| Republic's name | Capital city | Duration of rule |
|---|---|---|
| Republic of Venice | Venice | 697–1797 |
| Republic of Pisa | Pisa | 1000–1406 |
| Republic of Siena | Siena | 1125–1555 |
| Republic of Cospaia | Cospaia | 1441–1836 |
| Republic of Sassari | Sassari | 1259–1323 |
| Republic of Massa | Massa Marittima | 1225–1336 |
| Republic of Lucca | Lucca | 1160–1805 |
| Golden Ambrosian Republic | Milan | 1447–1450 |
| Republic of Genoa | Genoa | 1000–1797 |
| Republic of Ancona | Ancona | 1000–1532 |
| Republic of Noli | Noli | 1192–1797 |
The cities ofMagna Graecia and ofEtruria are among the earliest examples of city-states in Italy. The Latin settlement of Rome also was a city-state, founded in the 753 BC. Rome eventually created many colonies andmunicipi on earlier Etruscan, Umbrian, or Celtic settlements throughout Italy. The network of Roman cities in Italy survived the fall of the Western Roman Empire and provided the basis for the re-emergence of city-states in theMedieval period.

Among the earliest medieval city-states of Italy, that already started to emerge in the 7th century, were theDuchy of Naples,Duchy of Amalfi,Gaeta and theRepublic of Venice which, although nominally under Byzantine control, were effectively independent.[a][1] TheDuchy of Spoleto and theDuchy of Benevento were under Lombard control.
The other early Italian city-states to appear in northern andcentral Italy arose as a result of a struggle to gain greater autonomy during the rule of theHoly Roman Empire.[2] TheLombard League was an alliance that included at its apex most of the cities ofnorthern Italy including Milan,Piacenza, Cremona,Mantua,Crema,Bergamo,Brescia,Bologna,Padua,Treviso,Vicenza,Verona,Lodi,Reggio Emilia andParma, although its membership changed through time. Other city-states were associated to these"commune" cities, like Genoa,Turin and, in central Italy, the city states of Florence, Pisa, Lucca, Siena,Ancona,Città di Castello,Perugia,Terni,Assisi among others.
South ofRome and thePapal States were the duchies ofSalerno,Amalfi,Duchy of Naples andDuchy of Gaeta. Other independent cities wereBari andTrani, which in 1130 were united in the newly created NormanKingdom of Sicily.[3]

Amalfi, Gaeta and Venice in the 11th century were already autonomous maritime republics. Around 1100,Genoa,Pisa andAncona emerged as independentmaritime republics too: trade, shipbuilding and banking helped support their powerful navies in theMediterranean in those medieval centuries.[4]

Between the 12th and 13th centuries, Italy was vastly different from feudalEurope north of theAlps. The Peninsula was amelange of political and cultural elements, not a unified state.
The very mountainous nature of Italy's landscape was a barrier to effective inter-city communication. ThePo plain was an exception: it was the only large contiguous area, and most city states that fell to invasion were located there. Those that survived the longest were in the more rugged regions, such as Florence or Venice, which was protected by its lagoon.
The rugged terrain of the Alps prevented the HolyRoman Emperors or various German princes and lords from attacking the northern part of Italy, safeguarding the country from permanent German political control. Largely for these reasons, no strongmonarchies emerged as they did in the rest of Europe. Authority of the Holy Roman Empire over northern Italian territory, especially after the year 1177, wasde facto only nominal. Instead emerged the autonomous (sometimesde facto independent)city-states.
While those Roman, urban, republican sensibilities persisted, there were many movements and changes afoot. Italy first felt the changes in Europe from the 11th to the 13th centuries. Typically there was:

It is estimated that the per capita income of northern Italy nearly tripled from the 11th century to the 15th century. This was a highly mobile, demographically expanding society, fueled by rapidly expanding commerce.
In the 14th century, just as the Italian Renaissance was beginning, Italy was the economic capital of WesternEurope: the Italian States were the top manufacturers of finished woolen products. With theBubonic Plague in 1348, the birth of the English woolen industry, and general warfare, Italy temporarily lost its economic advantage. By the late 15th century Italy was again in control of trade along the Mediterranean Sea. It found a new niche in luxury items like ceramics, glassware, lace and silk as well as experiencing a temporary rebirth in the woolen industry.[5]
Italy never regained its strong hold on textiles. Though it was the birthplace of banking, by the 16th century German and Dutch banks began taking away business. The discovery of theAmericas as well as new trade routes toAfrica andIndia by the Portuguese, which madePortugal the leading trading power, brought about the shift of economic power from Italy[6] to Portugal in the 16th century, from Portugal to the Netherlands in the 17th century, and from the Netherlands to the United Kingdom in the 18th century.

By the 13th century, northern and central Italy had become the most literate society in the world. More than one-third of the male population could read in the vernacular (an unprecedented rate since the decline of theWestern Roman Empire), as could a small but significant proportion of women.
The Italian city states were also highly numerate, given the importance of the new forms ofbookkeeping that were essential to the trading and mercantile basis of society. Some of the most widely circulating books, such as theLiber Abaci byLeonardo Fibonacci of Pisa, included applications of mathematics and arithmetic to business practice[7] or were business manuals based on sophisticated numeracy.
Indeed,Luca Pacioli helped create the banking system of the Italian city-states withdouble-entry bookkeeping.[8] His 27-page treatise on bookkeeping contained the first known published work on that topic, and is said to have laid the foundation for double-entry bookkeeping (of Genoese merchants) as it is practised today.[9]

During the 11th century in northern Italy a new political and social structure emerged: the city-state orcommune. The civic culture which arose from thisurbs was remarkable. In some places where communes arose (e.g. Britain and France), they were absorbed by the monarchical state as it emerged. They survived in northern and central Italy as in a handful of other regions throughout Europe to become independent and powerful city-states.
In Italy the breakaway from their feudal overlords occurred in the late 12th century and 13th century, during theInvestiture Controversy between the Pope and theHoly Roman Emperor: Milan led the Lombard cities against the Holy Roman Emperors and defeated them, gaining independence (battles of Legnano, 1176, andParma, 1248; seeLombard League).
Some Italian city-states became great military powers very early on. Venice and Genoa acquired vast naval empires in the Mediterranean and Black Seas, some of which threatened those of the growing Ottoman Empire. During theFourth Crusade (1204), Venice conquered three-eights of the Byzantine Empire.[10]
TheMaritime Republics were one of the main products of this new civic and social culture based on commerce and exchange of knowledge with other areas of the world outside western Europe. The Republic of Venice and the Republic of Genoa for example, had important trade communications with the Muslim and Byzantine world and this helped the initial development of the ItalianRenaissance.[10]
By the late 12th century, a new and remarkable society had emerged in Northern Italy; rich, mobile, expanding, with a mixed aristocracy and urbanborghese (burgher) class, interested in urban institutions and republican government. But many of the new city-states also housed violent factions based on family, confraternity and brotherhood, which undermined their cohesion (for instance theGuelphs and Ghibellines).

By 1300, most of these republics had become princely states dominated by aSignore. The exceptions were the Republics of Venice, Florence, Genoa, Lucca, and a few others, which remained republics in the face of an increasingly monarchic Europe. In many cases by 1400 the Signori were able to found a stable dynasty over their dominated city (or group of regional cities), obtaining a nobility title of sovereignty by their formal superior. For example in 1395Gian Galeazzo Visconti bought the title ofDuke of Milan from the KingWenceslaus for 100,000 goldflorins.
In the fourteenth and fifteenth centuries, Milan, Venice, and Florence were able to conquer other city-states, creating regional states. The 1454Peace of Lodi ended their struggle for hegemony in Italy, attaining abalance of power (seeItalian Renaissance).[11]
At the beginning of the 16th century, apart from some city-states like Genoa, Lucca orSan Marino, only the Republic of Venice was able to preserve its independence and to match the European monarchies ofFrance andSpain and theOttoman Empire (seeItalian Wars).