List of cities in the European Union by population within city limits in the context of "Vienna"

Rome is the capital city and most populated comune (municipality) of Italy. It is also the administrative centre of the Lazio region and of the Metropolitan City of Rome. A special comune named Roma Capitale with 2,746,984 residents in 1,287.36 km (497.1 sq mi), Rome is the third most populous city in the European Union by population within city limits. The Metropolitan City of Rome Capital, with a population of 4,223,885 residents, is the most populous metropolitan city in Italy. Its metropolitan area is the third-most populous within Italy. Rome is located in the central-western portion of the Italian Peninsula, within Lazio (Latium), along the shores of the Tiber Valley. Vatican City (the smallest country in the world and headquarters of the worldwide Catholic Church under the governance of the Holy See) is an independent country inside the city boundaries of Rome, the only existing example of a country within a city. Rome is often referred to as the City of Seven Hills due to its geography, and also as the "Eternal City". Rome is generally considered to be one of the cradles of Western civilization and Western Christian culture, and the centre of the Catholic Church.

Rome's history spans 28 centuries. While Roman mythology dates the founding of Rome at around 753 BC, the site has been inhabited for much longer, making it a major human settlement for over three millennia and one of the oldest continuously occupied cities in Europe. The city's early population originated from a mix of Latins, Etruscans, and Sabines. Eventually, the city successively became the capital of the Roman Kingdom, the Roman Republic and the Roman Empire, and is regarded by many as the first-ever Imperial city and metropolis. It was first called The Eternal City (Latin: Urbs Aeterna; Italian: La Città Eterna) by the Roman poet Tibullus in the 1st century BC, and the expression was also taken up by Ovid, Virgil, and Livy. Rome is also called Caput Mundi (Capital of the World).

Paris is the capital and largest city of France, with an estimated city population of 2,048,472 in an area of 105.4 km (40.7 sq mi), and a metropolitan population of 13,171,056 as of January 2025. Located on the river Seine in the centre of the Île-de-France region, it is the largest metropolitan area and fourth-most populous city in the European Union (EU). Nicknamed the City of Light, partly because of its role in the Age of Enlightenment, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, fashion, and gastronomy since the 17th century.

Administratively, Paris is divided into twenty arrondissements (districts), each having their own cultural identity. Haussmann's renovation of Paris, which created new boulevards, parks, and public works, gave birth to a modern city known as the "capital of the 19th century". Paris is a major railway, motorway, and air-transport hub; in 2024 Charles de Gaulle Airport was the EU's busiest airport. Paris has one of the most sustainable transportation systems and is one of only two cities in the world that has received the Sustainable Transport Award twice. Its Art Nouveau-decorated Métro has become a symbol of the city. Paris is known for its museums and architectural landmarks: the Musée d'Orsay, Musée Marmottan Monet, and Musée de l'Orangerie are noted for their collections of French Impressionist art, while the Musée National d'Art Moderne, Musée Rodin, and Musée Picasso are noted for their collections of modern and contemporary art. Parts of the city along the Seine have been designated as a UNESCO World Heritage Site since 1991.

Hamburg, officially the Free and Hanseatic City of Hamburg, is the second-largest city in Germany after Berlin and seventh-largest city in the European Union, with a population of over 1.9 million. The Hamburg Metropolitan Region has a population of over 5.1 million and is the tenth-largest metropolitan region by GDP in the European Union.

At the southern tip of the Jutland Peninsula, Hamburg stands on the branching River Elbe at the head of a 110 km (68 mi) estuary to the North Sea, at the confluence of the Alster and Bille. Hamburg is one of Germany's three city-states alongside Berlin and Bremen, and is surrounded by Schleswig-Holstein to the north and Lower Saxony to the south. The Port of Hamburg is Germany's largest and Europe's third-largest, after Rotterdam and Antwerp. The local dialect is a variant of Low Saxon.

Warsaw, officially the Capital City of Warsaw, is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland. Its population is officially estimated at 1.86 million residents within a greater metropolitan area of 3.27 million residents, which makes Warsaw the 6th most-populous city in the European Union. The city area measures 517 km (200 sq mi) and comprises 18 districts, while the metropolitan area covers 6,100 km (2,355 sq mi). Warsaw is classified as an alpha global city, a major political, economic and cultural hub, and the country's seat of government. It is also the capital of the Masovian Voivodeship.

Warsaw traces its origins to a small fishing town in Masovia. The city rose to prominence in the late 16th century, when Sigismund III decided to move the Polish capital and his royal court from Kraków. Warsaw surpassed Gdańsk as Poland's most populous city by the 18th century. It served as the capital of the Polish–Lithuanian Commonwealth until 1795, and subsequently as the seat of Napoleon's Duchy of Warsaw. The 19th century and its Industrial Revolution brought a demographic boom, which made it one of the largest and most densely populated cities in Europe. Known then for its elegant architecture and boulevards, Warsaw was bombed and besieged at the start of World War II in 1939. Much of the historic city was destroyed and its diverse population decimated by the Ghetto Uprising in 1943, the general Warsaw Uprising in 1944, and systematic razing.

Budapest is the capital and most populous city of Hungary. It is Hungary's primate city with 1.7 million inhabitants and its greater metro area has a population of about 3.3 million, representing one-third of the country's population and producing above 40% of the country's economic output. Budapest is the political, economic, and cultural center of the country, among the ten largest cities in the European Union and the second largest urban area in Central and Eastern Europe. Budapest stands on the River Danube and is strategically located at the center of the Pannonian Basin, lying on ancient trade routes linking the hills of Transdanubia with the Great Plain.

Budapest is a global city, consistently ranked among the 50 most important cities in the world, belongs to the narrow group of cities with a GDP over US$100 billion, named a global cultural capital as having high-quality human capital, and is among the 35 most liveable cities in the world. The city is home to over 30 universities with more than 150,000 students, most of them attending large public research universities that are highly ranked worldwide in their fields, such as Eötvös Loránd University in natural sciences, Budapest University of Technology in engineering and technology, MATE in life sciences, and Semmelweis University in medicine. Budapest also hosts various international organizations, including several UN agencies, the WHO Budapest Centre, IOM regional centre, the EU headquarters of EIT and CEPOL, as well as the first foreign office of China Investment Agency. Budapest opened the first underground transit line on the European continent in 1896, which is still in use as M1 Millennium Underground, and today the fixed-track metro and tram network forms the backbone of Budapest's public transport system and transports 2.2 million people daily, making it a significant urban transit system.

Bucharest (UK: /ˌbuːkəˈrɛst/ BOO-kə-REST, US: /ˈbuːkərɛst/ -⁠rest; Romanian: București [bukuˈreʃtʲ] ) is the capital and largest city of Romania. The metropolis stands on the River Dâmbovița in south-eastern Romania. Its population is officially estimated at 1.71 million residents within a greater metropolitan area of 2.31 million residents, which makes Bucharest the 8th most-populous city by population within city limits in the European Union. The city area measures 240 km (93 sq mi), while the metropolitan area covers 1,811 km (699 sq mi). The city proper is administratively known as the "Municipality of Bucharest" (Romanian: Municipiul București), and has the same administrative level as that of a national county, being further subdivided into six sectors, each governed by a local mayor. Bucharest is a major cultural, political and economic hub, the country's seat of government, and the capital of the Muntenia region.

Bucharest was first mentioned in documents in 1459. The city became the capital in 1862 and is the centre of Romanian media, culture, and art. Its architecture is a mix of historical (mostly Eclectic, but also Neoclassical and Art Nouveau), interbellum (Bauhaus, Art Deco, and Romanian Revival architecture), socialist era, and modern. In the period between the two World Wars, the city's elegant architecture and the sophistication of its elite earned Bucharest the nicknames of Little Paris, or Paris of the East. Although buildings and districts in the historic city centre were heavily damaged or destroyed by war, earthquakes, and even Nicolae Ceaușescu's program of systematization, many survived and have been renovated. In recent years, the city has been experiencing an economic and cultural boom. It is one of the fastest-growing high-tech cities in Europe. In 2016, the historical city centre was listed as "endangered" by the World Monuments Watch.

Brno (/ˈbɜːrnoʊ/ BUR-noh, Czech pronunciation: [ˈbr̩no] ; German: Brünn [bʁʏn] ) is a city in the South Moravian Region of the Czech Republic. Located at the confluence of the Svitava and Svratka rivers, Brno has about 403,000 inhabitants, making it the second-largest city in the Czech Republic after the capital, Prague, and one of the 100 largest cities in the European Union. The Brno metropolitan area has approximately 730,000 inhabitants.

Brno served as the capital of Moravia from the Middle Ages until 1948, and remains the political and cultural hub of the South Moravian Region. Brno is an important centre of the Czech judiciary. The Constitutional Court, the Supreme Court, the Supreme Administrative Court, the Supreme Public Prosecutor's Office, as well as state authorities, such as the Ombudsman and the Office for the Protection of Competition, are all located here. Brno is also an important centre of learning and higher education, with 10 universities, 29 faculties and a student population of over 65,000, as well as more than 60 secondary schools throughout the city.