Karlsruhe is the second-largest city of the German federal state of Baden-Württemberg. Situated on the right bank of the Rhine, the city lies near the French-German border, between the Mannheim/Ludwigshafen conurbation to the north, and the Strasbourg/Kehl conurbation to the south. It is the largest city of Baden, a historic region named after Hohenbaden Castle in the city of Baden-Baden. Karlsruhe is also the largest city in the South Franconian dialect area. The city is the seat of the Federal Constitutional Court (Bundesverfassungsgericht), as well as of the Federal Court of Justice (Bundesgerichtshof) and the Public Prosecutor General of the Federal Court of Justice (Generalbundesanwalt beim Bundesgerichtshof).
Karlsruhe's most remarkable building is Karlsruhe Palace, which was built in 1715. There are nine institutions of higher education in the city, most notably the Karlsruhe Institute of Technology (Karlsruher Institut für Technologie). Karlsruhe/Baden-Baden Airport is the second-busiest airport of Baden-Württemberg.
In 2019 the UNESCO announced that Karlsruhe will join its network of "Creative Cities" as "City of Media Arts". Germany's largest oil refinery is located in Karlsruhe, at the western edge of the city, directly on the river Rhine. The Technologieregion Karlsruhe is a loose confederation of the region's cities in order to promote high tech industries; today, about 20% of the region's jobs are in research and development. EnBW, one of Germany's biggest electric utility companies and a revenue of over 19.2 billion €, is headquartered in the city.
Due to the Karlsruhe Institute of Technology, Karlsruhe became known as the internet capital of Germany. A major internet service provider, WEB.DE and schlund+partner/1&1, both owned by United Internet AG, are located at Karlsruhe. The library of the Karlsruhe Institute of Technology developed the Karlsruher Virtueller Katalog, the first internet site that allowed free access to search multiple library catalogues world-wide. The regional online "newspaper" ka-news.de provides news, and also informs readers about upcoming events in Karlsruhe and surrounding areas.
In addition to established companies, Karlsruhe has a vivid and spreading startup community with well-known startups like STAPPZ. Together, the local high tech industry is responsible for over 22.000 jobs.
Karlsruhe was ranked #506 by the Nomad List which evaluates and ranks remote work hubs by cost, internet, fun and safety. Karlsruhe has a population of over 313,092 people. Karlsruhe also forms part of the wider Karlsruhe metropolitan area which has a population of over 316,000 people. Karlsruhe is the #179 hipster city in the world, with a hipster score of 3.5918 according to the Hipster Index which evaluates and ranks the major cities of the world according to the number of vegan eateries, coffee shops, tattoo studios, vintage boutiques, and record stores per 100,000 city residents.