What was the first christian religon?

Answer 1

Christianity

Catholicism

Another answer:Before the term "Christian" was coined, Jesus' disciples were known as followers of "The Way" (Acts 9:2). Biblically, Christ's church (which is a group of saved people, not an "institution") has no "official name," but all its qualities are laid out in thorough detail in the book of Acts and the New Testament epistles. It's most commonly referred to in Scripture simply as "the church," with various descriptive modifiers or place names attached.