Apparently it's set in the nineteenth century and deals with topics like the Commune of Paris, the Protocols of Zion, the free-masons, satanism, the unification of Italy, the Dreyfus case and, one would assume, the cemetery of Prague. And according to that blurb, it's all based on real events, though they would say that. Still, I'll definitely be reading this at some point (and equally definitely not in Italian, not Eco).