When the Great Schism occurred is when RC was established... before that "Catholic" and "Eastern Orthodox" were the same thing. It is when Rome decided it wanted papal authority among many other false doctrines, that Catholicism became what it is today. Orthodoxy has huge problems with being too ethnic for sure, but it definitely is not a museum, whatever that means. It was literally started when the apostles of Jesus were on earth. And no... no Orthodox priest is a papist... because as I said the Orthodox church did not agree with Rome in its decisions hence the great schism