When the church began

[JoeChan82]

I have had a few conversations concerning the topic of when the church. In my opinion, if the church can be defined as a called out assembly of baptized believers having Christ as their head, then the church began during the earthly ministry of Christ and the twelve disciples. It seems to me that the day of Pentecost was the empowering of the church by the Holy Ghost. After Peter addressed the crowd, we read in Acts 2:41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls. I understand that where you place the beginning of the church directly affects other doctrines, but I do not understand why. Any thoughts?