The First Presbyterian Church of Rome?
"There exists a broad consensus among scholars, including most Catholic ones, that such churches as Alexandria, Philippi, Corinth and Rome most probably continued to be led for some time by a college of presbyters, and that only in the second century did the threefold structure of become generally the rule, with a bishop, assisted by presbyters, presiding over each local church."
[Sullivan F.A. From Apostles to Bishops: the development of the episcopacy in the early church. Newman Press, Mahwah (NJ), 2001, pp. 13,14,15]