Sure, we’ll go with the Roman Catholic church... when do you believe it formed?
The “roman catholic church” was formed when the pagan emperor Constantine outlawed the worship of Yeshua HaMassiach, and the observance of his feasts, and appointed December 25, the supposed birthdate of Mithra or Tammuz, as the birth date of his false messiah, whom he gave the pagan title of “cristos,” which means man who became god.
Well, let’s just say that your contention that it started with Peter and Christ couldn’t possibly be true. Here’s a hint for you. It’s called the Roman Catholic Church. AKA the church started by Romans. Incorporating many of the pagan beliefs, practices, and vestments of the Roman pagan religions.