The architecture of this building is unmistakably Art Nouveau, featuring a grand, ornate facade and a distinctive copper dome. The cobblestone square and the overall style of the urban landscape strongly point toward Central Europe. I recognize this specific building as the Municipal House in Prague. The flags hanging on the facade are consistent with the Czech Republic. I am very confident in this location.

Country: Czech Republic, City: Prague.
Confidence: 95%.

then: guess