Italian unification (Italian: il Risorgimento [risordʒiˈmento], meaning The Resurgence) was the political and social movement that agglomerated different states of the Italian peninsula into the single state of Italy in the 19th century. Despite a lack of consensus on the exact dates for the beginning and end of this period, many scholars agree that the process began in 1815 with the Congress of Vienna and the end of Napoleonic rule, and ended in 1871 with the Franco-Prussian War. The last città irredente however, did not join the Kingdom of Italy until after World War I.

After the fall of the Western Roman Empire, Italy gradually developed into a system of city-states. This system lasted through the Renaissance but began to deteriorate with the rise of modern nation-states in the early modern period. Italy, including the Papal States, then became the site of proxy fights between the major powers, notably the Holy Roman Empire (later Austria as well as Prussia) and France. In the 1300s, Italian writers had expressed their opposition to foreign domination. For example, Petrarch's Italia Mia stated that the "ancient valor in Italian hearts is not yet dead." Four verses from Italia Mia were quoted in Niccolò Machiavelli's The Prince, which looked for a political leader who would unite Italy.

Italy ⁱ/ˈɪtəli/ (Italian: Italia [iˈtaːlja]), officially the Italian Republic or the Republic of Italy (Italian: Repubblica italiana), is a unitary parliamentary republic in south-central Europe. To the north, it borders France, Switzerland, Austria and Slovenia along the Alps. To the south, it consists of the entirety of the Italian Peninsula, Sicily, Sardinia–the two largest islands in the Mediterranean Sea–and many other smaller islands. The independent states of San Marino and the Vatican City are enclaves within Italy, while Campione d'Italia is an Italian exclave in Switzerland. The territory of Italy covers some 301,338 km² (116,347 sq mi) and is influenced by a temperate seasonal climate. With 60.6 million inhabitants, it is the fifth most populous country in Europe, and the 23rd most populous in the world.

Rome, the capital of Italy, was for centuries a political and religious centre of Western civilisation as the capital of the Roman Empire and site of the Holy See. After the decline of the Roman Empire, Italy endured numerous invasions by foreign peoples, from Germanic tribes such as the Lombards and Ostrogoths, to the Byzantines and later, the Normans, among others. Centuries later, Italy became the birthplace of Maritime republics and the Renaissance, an immensely fruitful intellectual movement that would prove to be integral in shaping the subsequent course of European thought.