Mark Zuckerberg, Priscilla Rome During Honeymoon

0527_zuckerberg_exposure2Mark Zuckerberg and Priscilla Chan blended with the crowd during their honeymoon in Rome -- as best as a gazillionaire can blend.

It looks like they didn't attract much attention -- in fact, they seem to go unnoticed by most people in the crowded restaurant in the middle of the famed city.

Italy is fitting, because Mark said "arrivederci" to around 3 billion bucks this week after his Facebook stock took a nosedive.