Kingdom of Italy in the context of "Treaty of Lausanne"

Apulia (/əˈpuːliə/ ə-POO-lee-ə), also known by its Italian name Puglia (Italian: [ˈpuʎʎa]), is a region of Italy, located in the southern peninsular section of the country, bordering the Adriatic Sea to the east, the Strait of Otranto and Ionian Sea to the southeast and the Gulf of Taranto to the south. The region comprises 19,345 square kilometers (7,469 sq mi), and has 3,874,166 inhabitants as of 2025. It is bordered by the other Italian regions of Molise to the north, Campania to the west, and Basilicata to the southwest. The regional capital is Bari.

In ancient times, more precisely at the beginning of the first millennium BC, the region of Apulia was inhabited by the Iapygians, while during the 8th century BC its coastal areas were populated by ancient Greeks. Later, the region was conquered by the ancient Romans. It was then conquered by the Byzantines, followed by the Normans, the Aragonese and the Spanish. Subsequently, it became part of the Kingdom of the Two Sicilies, to then be annexed to the unified Kingdom of Italy after the Expedition of the Thousand.

The Italian city-states were numerous political and independent territorial entities that existed in the Italian Peninsula from antiquity to the formation of the Kingdom of Italy in the late 19th century.

The ancient Italian city-states were Etruscan (Dodecapolis), Latin, most famously Rome, and Greek (Magna Graecia), but also of Umbrian, Celtic and other origins. After the fall of the Western Roman Empire, urban settlements in Italy generally enjoyed a greater continuity than settlements in western Europe. 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.

Vatican City, officially the Vatican City State (Italian: Stato della Città del Vaticano; Latin: Status Civitatis Vaticanae), often shortened as the Vatican, is a landlocked sovereign city-state. Ruled by the pope, it is an enclave within Rome and serves as the administrative centre of the Catholic Church. Vatican City is governed by the See of Rome, commonly known as the Holy See, itself a sovereign entity under international law, which maintains its temporal power, governance, diplomacy, and spiritual independence. Vatican is also used as a metonym for the Holy See, which is the central governing body of the Catholic Church and Vatican City, comprising the pope and the Roman Curia. The independent state of Vatican City came into existence in 1929 via the Lateran Treaty between the Holy See and the Kingdom of Italy, which spoke of it as a new creation, not as a vestige of the much larger Papal States (756–1870), which had previously encompassed much of Central Italy.

With an area of 48.99 hectares (121 acres) and a population of about 882 in 2024, it is the smallest sovereign state in the world both by area and by population. It is among the least populated capitals in the world. As governed by the Holy See, Vatican City State is an ecclesiastical or sacerdotal-monarchical state ruled by the pope, who is the bishop of Rome and head of the Catholic Church; the highest state functionaries are all Catholic clergy of various origins. The Holy See dates to early Christianity and is the principal episcopal see of the Catholic Church, which in 2018 had about 1.329 billion baptized Catholics in the world, in the Latin Church and 23 Eastern Catholic Churches. After the Avignon Papacy (1309–1377) the popes have mainly resided at the Apostolic Palace within what is now Vatican City, although at times residing instead in the Quirinal Palace in Rome or elsewhere.

Milan (/mɪˈlæn/ mil-AN, US also /mɪˈlɑːn/ mil-AHN, Milanese: [miˈlãː] ; Italian: Milano [miˈlaːno] ) is the regional capital of Lombardy, in northern Italy, and the second-most populous city in Italy, with a population of 1.36 million in 2025. The Metropolitan City of Milan is the largest city in Italy by urban area. Its wider metropolitan area is the largest in Italy, and the fourth-largest in the European Union, with an estimated population of 6.1 million.

Founded around 590 BC by a Celtic tribe, Milan was conquered by the Romans in 222 BC, who Latinized the name of the city into Mediolanum and made it the capital of the Western Roman Empire. In the Late Medieval period, the wealthy Duchy of Milan was one of the greatest forces behind the Renaissance. As a major center of the Italian Enlightenment during the Early modern period, Milan's cultural and political struggle against Austrian domination was crucial in the reunification of the Kingdom of Italy. From the 19th century onwards, Milan led the industrial and financial development of Italy.

Libya, officially the State of Libya, is a country in the Maghreb region of North Africa. It borders the Mediterranean Sea to the north, Egypt to the east, Sudan to the southeast, Chad to the south, Niger to the southwest, Algeria to the west, and Tunisia to the northwest. With an area of almost 1.8 million km (700,000 sq mi), Libya is the fourth-largest country in Africa and the Arab world, and the 16th-largest in the world. The country claims 32,000 square kilometres of southeastern Algeria, south of the Libyan town of Ghat. The capital and largest city is Tripoli, located in the northwest and contains over a million of Libya's 7 million people.

Libya has been inhabited by Berbers since the late Bronze Age as descendants from Iberomaurusian and Capsian cultures. In classical antiquity, the Phoenicians established city-states and trading posts in western Libya, while several Greek cities were established in the East. Parts of Libya were variously ruled by Carthaginians, Numidians, Persians, and Greeks before the entire region became a part of the Roman Empire. Libya was an early centre of Christianity. After the fall of the Western Roman Empire, the area of Libya was mostly occupied by the Vandals until the 7th century when invasions brought Islam to the region. From then on, centuries of Arab migration to the Maghreb shifted the demographic scope of Libya in favour of Arabs. In the 16th century, the Spanish Empire and the Knights Hospitaller occupied Tripoli until Ottoman rule began in 1551. Libya was involved in the Barbary Wars of the 18th and 19th centuries. Ottoman rule continued until the Italo-Turkish War in 1911, which resulted in Italy occupying Libya and establishing two colonies: Italian Tripolitania and Italian Cyrenaica, later unified in the Italian Libya colony from 1934 to 1943.

Lazio (UK: /ˈlætsioʊ/ LAT-see-oh, US: /ˈlɑːt-/ LAHT-; Italian: [ˈlattsjo]) or Latium (/ˈleɪʃiəm/ LAY-shee-əm, US also /-ʃəm/ -⁠shəm; from the original Latin name, pronounced [ˈɫati.ũː]) is one of the 20 administrative regions of Italy. Situated in the central peninsular section of the country, it has 5,714,882 inhabitants and a GDP of more than €212 billion per year, making it the country's second most populated region and second largest regional economy after Lombardy. The capital of Lazio is Rome, which is the capital city of Italy.

Lazio was the home of the Etruscan civilization, then stood at the center of the Roman Republic, of the Roman Empire, of the Papal States, of the Kingdom of Italy and of the Italian Republic. Lazio boasts a rich cultural heritage. Great artists and historical figures lived and worked in Rome, particularly during the Italian Renaissance period.

Turin (/tjʊəˈrɪn, ˈtjʊərɪn/ ture-IN, TURE-in, Piedmontese: [tyˈriŋ] ; Italian: Torino [toˈriːno] ; Latin: Augusta Taurinorum, then Taurinum) is a city and an important business and cultural centre in northern Italy. It is the capital city of the Piedmont region and of the Metropolitan City of Turin. From 1861 to 1865, it was the first capital of the Kingdom of Italy. The city is mainly on the western bank of the River Po, below its Susa Valley, and is surrounded by the western Alpine arch and Superga hill. The population of the city proper is 856,745 as of 2025, while the population of the urban area is estimated by Eurostat to be 1.7 million inhabitants. The Turin metropolitan area is estimated by the OECD to have a population of 2.2 million.

The city was historically a major European political centre. From 1563, it was the capital of the Duchy of Savoy, then of the Kingdom of Sardinia ruled by the House of Savoy, and the first capital of the Kingdom of Italy from 1861 to 1865. Turin is sometimes called "the cradle of Italian liberty" for having been the political and intellectual centre of the Risorgimento that led to the unification of Italy, as well as the birthplace of notable individuals who contributed to it, such as Camillo Benso, Count of Cavour.

Florence (/ˈflɒrəns/ FLORR-ənss; Italian: Firenze [fiˈrɛntse] ) is the capital city of the Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in its metropolitan province as of 2025.

Florence was a centre of medieval European trade and finance and one of the wealthiest cities of that era. It is considered by many academics to have been the birthplace of the Renaissance, becoming a major artistic, cultural, commercial, political, economic and financial center. During this time, Florence rose to a position of enormous influence in Italy, Europe, and beyond. Its turbulent political history includes periods of rule by the powerful Medici family and numerous religious and republican revolutions. From 1865 to 1871 the city served as the capital of the Kingdom of Italy. The Florentine dialect forms the base of standard Italian and it became the language of culture throughout Italy due to the prestige of the masterpieces by Dante Alighieri, Petrarch, Giovanni Boccaccio, Niccolò Machiavelli and Francesco Guicciardini.

Veneto, officially the Region of Veneto, is one of the 20 regions of Italy, located in the north-east of the country. It is the 4th most populous region in Italy, with a population of 4,851,851 as of 2025. Venice is the region's capital while Verona is the largest city.

Veneto was part of the Roman Empire until the 5th century AD. Later, after a feudal period, it was part of the Republic of Venice until 1797. Venice ruled for centuries over one of the largest and richest maritime republics and trade empires in the world. After the Napoleonic Wars and the Congress of Vienna, the former Republic was combined with Lombardy and re-annexed to the Austrian Empire as the Kingdom of Lombardy–Venetia, until that was merged with the Kingdom of Italy in 1866, as a result of the Third Italian War of Independence and of a plebiscite.