Winter 2019, between 12:00 AM and 3:00 AM, before the arrival of the first sub-zero temperatures.
Downtowns are shopping streets, interchange points for underground commuters, meeting places, and event venues. Many people try to avoid as much as possible the place as much as possible. For other, it becomes an involuntary home. At night, you can see what remains from the daily operations. The B-level of Frankfurt's metro station "Hauptwache" is one of the few places where homeless individuals are allowed to stay during winter nights.