The architecture is classic Central European, with ornate, multi-story buildings typical of Vienna. The signage is in German, specifically mentioning "Wohnprojekt" and "Immobiliengruppe," which confirms an Austrian context. The road markings and the "BUS" lane indicate a major city. The overall aesthetic and the specific style of the street signs point strongly toward a historic district in Vienna. I am quite confident this is in Austria.

then: guess