Just as God's will is creation and is called "the world," so his intention is the salvation of men, and it is called "the Church." 155
Catechism number 765
The Lord Jesus endowed his community with a structure that will remain until the Kingdom is fully achieved. Before all else there is the choice of the Twelve with Peter as their head.168 Representing the twelve tribes of Israel, they are the foundation stones of the new Jerusalem.169 The Twelve and the other disciples share in Christ's mission and his power, but also in his lot.170 By all his actions, Christ prepares and builds his Church.