A financial district is a central area in a city known as a financial center, home to banks, investment firms, stock exchanges, and related companies. These districts are characterized by a mix of skyscrapers and older, historic buildings, often bustling with professionals during weekdays but quieting down in the evenings and on weekends. Landmarks include famous streets like Wall Street, major complexes like the World Trade Center, and a blend of modern and historic architecture. It is the core of a city's financial services industry, including banks, insurance companies, and stock exchanges.