In the Catholic, Orthodox, Anglican and non-Catholic Eastern Churches, there are all bishops, and they are considered to be the successors of the 12 apostles, the cornerstones on which Christ founded the Church. After Pentecost, they began to preach the Gospel to the world and united under the leadership of Peter, because Christ had appointed him as their Leader... Catechesis on the Second Vatican Council, structure, with Fr Justolat Rafaralahimboa.