I also say to you that you are Peter, and upon this rock I will build My church; and the gates of Hades will not overpower it.
According to scholars, the first reference Jesus makes to building a “church” or even mentioning the word is this word that He gave to Peter. As far as I can tell, this is one of the only “nuts” and “bolts” that Jesus ever gives concerning building a church.
Many make a case for either large church or small church based on various scriptures and reasonings. It is good to point out, however, that the Word actually says they did both.
Day by day continuing with one mind in the temple, and breaking bread from house to house, they were taking their meals together with gladness and sincerity of heart, praising God and having favor with all the people. And the Lord was adding to their number day by day those who were being saved.
This scripture makes it clear they met BOTH in the temple as a large congregation, and house to house, which seems to indicate smaller groups as well. But, what is interesting, is that no where is the character of these gatherings described by what we understand as a ‘meeting’ today. They met, sure, and they shared. There certainly would have been some format, but they weren’t doing “Sunday Morning” back then. They were glad, genuine, and thankful, because they had the Truth.