There are so many different churches and denominations today but there were no denominations in the early church. There was only one church established by Jesus at that time. However, after Jesus ascended into heaven and the apostles were martyred, numerous churches were established in the world. The way to find the true church established by God is very simple and easy. You just need to find out what church did Jesus establish and the apostles attended. You can find the answer if you look carefully in the Bible. All those who were saved attended the same church. Firtst, let's look at the case of the Apostle Paul who preached the gospel to many people traveling to various countries and regions in the world. 1Co 1:1~3 Paul, called to be an apostle of Christ Jesus by the will of God, and our brother Sosthenes, To the church of God in Corinth, to those sanctified in Christ Jesus and called to be holy, together with all those everywhere who call on the name of our Lord Jesu
"We trusted in him; let us rejoice and be glad in his salvation"