I see a street sign that says "Osterstraße" and a poster for a "Flohmarkt" (flea market) in German. The architecture, the bus, and the general urban layout strongly suggest a town in Germany. The presence of a "D" logo on a building is typical for a German supermarket chain. I am fairly confident this is in a German city, likely in northern Germany given the street name style.

Country: Germany
City: Hamburg
Confidence: High

then: guess