At the local level, the New Testament church was a house church; Christians met for worship in small groups in the homes of those members who might be wealthier or have larger houses. In a larger city, the church might meet in a number of house churches. In the New Testament, the word church may refer to the universal church, the church in a particular city, or the individual house church, which was part of the larger congregation.
The church is the assembly of the “saints,” or holy ones, a people called out of the world by God. The early church was an urban movement. It held a world view that differed from that of the prevailing culture, yet it came to include people of all social classes in its radical fellowship.