Bankenviertel is the name of the central business district in Frankfurt, Germany where many banks, insurance companies, and other financial institutions are located. It is the most important German financial hub, if not one of the largest in Europe along with La Défense in the Paris aire urbaine and London's City and Canary Wharf.

A central business district (CBD) is the commercial and business center of a city. It contains commercial space and offices, and in larger cities will often be described as a financial district. Geographically, it often coincides with the "city center" or "downtown". However, these concepts are not necessarily synonymous: many cities have a central business district located away from its commercial and/or cultural center and/or downtown/city center, and there may be multiple CBDs within a single urban area. The CBD will often be highly accessible and have a large variety and concentration of specialized goods and services compared to other parts of the city.