Is There a Re-Establishment of Central Imperial Authority in Europe?

Is there in the era of nation states, is there just one gigantic mega Western European state? I think that conclusively, no. Given our geography, given the layout of things, there can be no way for a central power or reassert itself onto the European continent after the fall of Rome. Without that, maybe you could re-impose central imperial authority. But again, we're assuming, what if you don't have that England down there? What if you don’t have this nexus of broken down authority that can be reconstituted by like, with this sort of osmotic relationship with the rest of Europe?