Short answers, pulled from the story.
Frankfurt am Main is the most populous city in the German state of Hesse, located in the foreland of the Taunus on the river Main. It forms a continuous conurbation with Offenbach am Main and sits at the heart of the Rhine-Main metropolitan region.
Frankfurt had 778,589 inhabitants as of 2025, making it the fifth-most populous city in Germany. Its urban area holds over 2.7 million people, and the wider Rhine-Main metropolitan region has more than 5.8 million.
Frankfurt is nicknamed Mainhattan, a blend of the Main river and Manhattan in New York City, because of its skyline of tall skyscrapers. It is one of the few cities in the European Union to have such a skyline, and Commerzbank Tower at 259 meters is the second-tallest building in the EU.
Frankfurt is the largest financial hub in continental Europe and is home to the European Central Bank, the Deutsche Bundesbank, and the Frankfurt Stock Exchange. The stock exchange accounts for more than 90 percent of the turnover in the German stock market and is the third-largest in Europe after London and Paris.
The name Frankfurt means the ford of the Franks on the Main, combining the Germanic tribe of the Franks with Furt, the German word for ford. It marks where the river Main ran shallow enough to be crossed on foot, and was first recorded in 794 as Franconofurd.
Frankfurt was first mentioned in a document in 794 and became an Imperial Free City in 1372. From 1562 to 1792 kings and emperors of the Holy Roman Empire were crowned and elected in St. Bartholomew's Cathedral, beginning with Maximilian II.
Frankfurt Airport became the busiest airport in Germany and serves as the primary hub for Lufthansa, the national airline and Europe's largest carrier. The airport offers Lufthansa 157 worldwide destinations and in 1961 ranked as Europe's second-busiest airport behind London Heathrow.