The street sign is a classic Italian "divieto di sosta" (no parking) sign, which is a strong indicator of Italy. The architecture, with its dense urban layout, stone-paved streets, and classic European apartment buildings, is very typical of northern Italian cities. The presence of a person walking and the general nighttime atmosphere feel like a busy city center. I suspect this is Milan, given the specific style of the buildings and the urban density. I am fairly confident in this assessment.

then: guess