"tu es petrus, " "you are peter, and upon this rock, i will build my church" inscribed in the dome over st. peter's. it is at the core of roman catholicism. >> but did peter really travel to rome to lay the foundations for the catholic church? >> the new testament says nothing explicitly about peter coming to rome, and i think a lot of people would be surprised to find this out. >> the apostle paul, who we know lived in rome and whose letters make up half of the new testament, doesn't refer to peter being in the city once. >> he doesn't seem to know of him. he doesn't mention any connection between the christians there in the city and peter, and that's kind of an interesting omission. so if peter's there in the city, why doesn't paul say anything about him at all? >> the omission is all the more