The Church is depicted in the book of Acts. If your church does not resemble that first church, it's not the church. FYI.
If that is the criteria then we can safely say that there is no church at all.
No church has looked identical to the church of the first century since, because there were specific historical, cultural, linguistic, and social forces and contexts that were in effect then that have not existed since.
Here are some examples:
1. The Church as depicted in the book of Acts was a minority religious sect within the cosmopolitan landscape of ancient imperial Rome. The Roman Empire, as ruled by the Julio-Claudian Dynasty ceased to exist with the death of Nero. Following Nero's death the Empire was taken through the period of the Roman Civil War and the year of the four emperors, with finally Vespasian taking the reigns.
2. The Church in the first century was within the lifetime and ministry of Jesus' Twelve Apostles, there were living apostles who had actually followed and known Jesus during His earthly ministry. That has never been the case since their death. Instead the apostles appointed bishops and presbyters who took on the work and ministry of pastoring the churches which they planted.
3. The Church in the first century was a Church that existed while the Jewish Temple still stood in Jerusalem, and Jewish Christians still participated in the rites of the Temple--as we see St. Paul who with some brothers from Jerusalem taking a vow and, at the end of the vow, offering a sacrifice in the Temple. The distinction between Judaism and Christianity was still very fuzzy here.
4. The Church faced discrimination from Jewish leadership as Christians were a very tiny sect, and later persecution under Roman imperial power starting with Nero blaming the fire in Rome on Christians--beginning the era of Roman persecution that lasted until Constantine signed the edict of toleration.
5. The Church in the first century did not have a New Testament, not even an Old Testament. There was instead a not well defined concept of Scripture which was inherited from Judaism of the time (both Jewish and Christian Canons of Scripture evolved and took shape in the centuries following the first century).
Today Christians number over 2 billion, nearly a third of the entire global population. It is the most widespread and populous religion on the planet. There is no Roman Empire--in any form. Christianity is no longer primarily made of Jewish converts, but non-Jewish converts. Christians are no longer suffering widespread persecution, there are still pockets of persecution in various places, but it is no longer a small persecuted minority within the world stage. There have not been any living apostles since St. John died. Christianity today has a well-defined Canon of Scripture, we call it the Bible.
This is one of the chief problems with the idea of Christian Primitivism. The other chief problem being that those who believe in Primitivism will, inevitably, make up their own way of doing church based on their private opinions about what the New Testament says and conclude that their new way of doing church must be how it was originally done--this is the great error that many have done in the past. It always leads to the creation of new denominations and usually new denominations that look almost nothing like what Christianity has looked like historically. Such restoration attempts have produced all manner of new churches and movements: for example Mormons and Jehovah's Witnesses, Christadelphians, the Stone-Campbell Churches, the Worldwide Church of God, and many others.
-CryptoLutheran