"So we, being many, are one body in Christ, and individually members of one another." (Rom.12:5)
The Church is not a denomination, for denominations are organizations, but the Church is one body, and the believers, being many, are individually members of one another, irrespective of location, language, nationality, or time period. Unity is organic, not organizational, obviously. Organizations exist for the sake of order and oversight; however, they can often be a hindrance to the individual. But, the Church has no name or human barriers. It is always one body. The deeper connection is undeniable and basic to the body no matter what the external identifiers may be; the Lord only knows His one body.