...Jerusalem 1st Century AD, the faith is delivered to the saints, initially, all devout Jews.
Only later did those devout men and women realize that the Gospel of repentance and remission of sins would be preached in ALL nations before The End would come.
Twelve, Jewish apostles turn the world upside down preaching the God given revelation of Peter who identified the Lord as JESUS The CHRIST, SON of the Living GOD . Peter's revelation and confession, is the Rock JESUS vowed to build and is building, His ecclesia upon.