There is only one Church of Jesus Christ, his Body and his Bride. In the upper room before his death he prayed that the Father would glorify him (John 17:1-5), that the Father would sanctify his Apostles in the Truth (John 17:6-19) and that his Church may be one, so that the world may believe (John 17:20-26).
All three requests were answered through his death, his resurrection, his ascension and in the gift of the Holy Spirit. The prayer sees the foundation of a church one, holy, catholic and apostolic. In particular it is one.