World city in the context of "Mumbai (Bombay)"

Frankfurt am Main, commonly referred to simply as Frankfurt, is the most populous city in the German state of Hesse. Its 778,589 inhabitants as of 2025 make it the fifth-most populous city in Germany. Located in the foreland of the Taunus on its namesake Main, the city forms a continuous conurbation with Offenbach am Main; its urban area has a population of over 2.7 million. Frankfurt is the heart of the larger Rhine-Main metropolitan region, which has a population of more than 5.8 million and is Germany's second-largest metropolitan region after the Rhine-Ruhr region. Home to the European Central Bank, the city serves as one of the four institutional seats of the European Union (alongside Brussels, Luxembourg and Strasbourg). Frankfurt is classified by the GaWC as an Alpha-rated world city.

Frankfurt was a city state, the Free City of Frankfurt, for nearly five centuries, and was one of the most important cities of the Holy Roman Empire, as a site of Imperial coronations; it lost its sovereignty upon the collapse of the empire in 1806, regained it in 1815 and then lost it again in 1866, when it was annexed (though neutral) by the Kingdom of Prussia. It has been part of the state of Hesse since 1945. Frankfurt is culturally, ethnically and religiously diverse, with half of its population, and a majority of its young people, having a migrant background. A quarter of the population consists of foreign nationals, including many expatriates. In 2015, Frankfurt was home to 1,909 ultra high-net-worth individuals, the sixth-highest number of any city.

Mumbai (/mʊmˈbaɪ/ muum-BY; Marathi: Mumbaī, pronounced [ˈmumbəi] ), also known as Bombay (/bɒmˈbeɪ/ bom-BAY; its official name until 1995), is the capital city of the Indian state of Maharashtra. Mumbai is the financial capital and the most populous city proper of India with an estimated population of 12.5 million (1.25 crore). Mumbai is the centre of the Mumbai Metropolitan Region, which is among the most populous metropolitan areas in the world with a population of over 23 million (2.3 crore). Mumbai lies on the Konkan coast on the west coast of India and has a deep natural harbour. In 2008, Mumbai was named an alpha world city. Mumbai has the highest number of billionaires out of any city in Asia.

The seven islands that constitute Mumbai were earlier home to communities of Marathi language-speaking Koli people. For centuries, the seven islands of Bombay were under the control of successive indigenous rulers before being ceded to the Portuguese Empire, and subsequently to the East India Company in 1661, as part of the dowry of Catherine of Braganza in her marriage to Charles II of England. Beginning in 1782, Mumbai was reshaped by the Hornby Vellard project, which undertook reclamation of the area between the seven islands from the Arabian Sea. Along with the construction of major roads and railways, the reclamation project, completed in 1845, transformed Mumbai into a major seaport on the Arabian Sea. Mumbai in the 19th century was characterised by economic and educational development. During the early 20th century it became a strong base for the Indian independence movement. Upon India's independence in 1947 the city was incorporated into Bombay State. In 1960, following the Samyukta Maharashtra Movement, a new state of Maharashtra was created with Mumbai as the capital.

Almería (UK: /ˌælməˈriːə/, US also /ˌɑːl-/, Spanish: [almeˈɾi.a] ) is a resort city and municipality of Spain, located in Andalusia. It is the capital of the province of the same name. The city lies in southeastern Iberia, extending primarily in between the eastern fringes of the Sierra de Gádor and the Andarax riverbed along the coastline of the Gulf of Almería, a large inlet of the Mediterranean Sea. The municipality has a population of 201,946.

Caliph Abd al-Rahman III founded the city in 955. The city grew wealthy during the Islamic era, becoming a world city throughout the 11th and 12th centuries. It enjoyed an active port that traded silk, oil, and raisins. This period was brought to an end with the 1147 conquest of the city by a Christian coalition. Control over Almería switched hands over the rest of the middle ages. In the early modern period, with the onset of Barbary piracy, the ethnic cleansing of moriscos in the Kingdom of Granada, and several natural calamities, urban decay accrued. The 19th-century reactivation of mining activity (lead) in the hinterland fostered commercial activity and demographic growth.

Expo 2010, officially the Expo 2010 Shanghai China, was held on both banks of the Huangpu River in Shanghai, China, from 1 May to 31 October 2010. It was a major World Expo registered by the Bureau International des Expositions (BIE), in the tradition of international fairs and expositions, the first since 2005. The theme of the exposition was "Better City – Better Life" and signifies Shanghai's new status in the 21st century as the "next great world city". The Expo emblem features the Chinese character 世 ('world', Chinese "shì") modified to represent three people together with the 2010 date. It had the largest number of countries participating and was the most expensive Expo in the history of the world's fairs. The Shanghai World Expo was also the largest World's Fair site ever at 5.28 square km.

By the end of the expo, over 73 million people had visited – a record attendance – and 246 countries and international organizations had participated. On 16 October 2010, the expo set a single-day record of over 1.03 million visitors.