European culture exists to a degree, it's the shared European heritage, but it was the culture of the elites and later cosmopolitans and not necessarily homogeneous
I think it's fair to say that Classical music is a part of European culture even if there have been regional variants, elites spread them and they soon became seen as just standard Classical music
The European restaurant tradition was born from the French restaurant tradition and supplanted all earlier forms
Napoleon heavily influenced many European countries to either adopt or copy the Napoleonic code as a part of nation-building
You also have to contend with the fact that through nation-building, many states tried to homogenous their own people for example enforcing a standard language and promoted a modern dress, the culture that they promoted as belonging to the nation was necessarily more of an elitist culture rather than a local one