Jesus Christ started Christianity, as those who followed him later on called themselves Christians. But for the most part, the Apostles taught Christianity, as they lived longer than Christ did. The Apostles Peter and Paul were the main ones.
who is the most inportant teacher of christianity
pastor
Jesus Christ. The son of God and our Saviour.
Catholicism IS Christianity.
The first emperor to legalize Christianity is Constantine
Jesus Christ
Before I answer, let me ask you first, What is important, the teacher or the teachings? For me it's the teachings. We may forget who the teacher was, but seldom do we forget the teachings. And since you put this questions in "Christianity" topic, see link on left "SAB: Good Stuff in the Bible".
Teacher
first of all........christianity has never ended
A kindergarten teacher....
Christianity is not about suffering, but of healing.
His first teacher was Iruka-Sensei when Naruto was at first training in the Ninja Academy.