Christians believe there is one big Church called the Universal Church. The big Church is made up of all Christians everywhere – it stretches around the world. It is in fact made up of all Christians that are alive now and have ever lived.
Of course it is not possible for all Christians in the Universal Church to meet together. However, lots of Christians meet together in smaller groups close to where they live. These groups of Christians are called local churches. All around the world there are thousands and thousands of local churches.
Christians often get together in their local churches on a Sunday because this is the day on which Christians have gathered together for hundreds of years. But Christians get together on other days too.
There are thousands of local churches around the world; there is however one universal Church.