Glinting with glass, steel and concrete skyscrapers, Frankfurt-on-the-Main (pronounced ‘mine’) is unlike any other German city. The focal point of a conurbation of 5.5 million inhabitants, ‘Mainhattan’ is a high-powered finance and business hub, home to one of the world’s largest stock exchanges and the gleaming headquarters of the European Central Bank, and famously hosts some of the world's most important trade fairs, attracting thousands of business travellers.