That's how it feels to me too - like I've been there to Diocletian's Palace and visited Venice even though I never have. I'm planning on visiting the ones in Italy at least, see how it matches up to what I saw in the Dreams. Probably not well considering there's over seventy years between today and where I am in them.
It's also kind of weird that one of my cousin's friends here is dreaming about me as a kid but his dreams are occurring in more recent times.