Suggest me a book where the conquered culture influence the conquering one

I'm looking for a book where the conquered culture influences the conquering one, similar to how Greece Hellenized Rome.

During Rome's conquest of Greece, between 201 and 146 BC, there was a mutual exchange of cultures: Greece was Romanized through Roman laws and Rome was Hellenized through Greek philosophy, mythology, and way of life. Greece's revenge towards the Roman conquest was the Hellenization of Rome.

I'm looking for a book, preferably science fiction, in which this happens.