The authoritative allegorizing of the twelfth and thirteenth centuries extended the symbolism of the Mass to the edifice in which it was celebrated; as the _Rationale_ sets forth in its opening chapter entitled “De ecclesia et eius partibus.” There it is shown that the corporeal church is the edifice, while the Church, spiritually taken, signifies the faithful people drawn together from all sorts of men as the edifice is constructed of all sorts of stones. The various names ecclesia, synagogue, basilica, and tabernacle are explained; and then why the Church is called the Body of Christ, and also Virgin, also Spouse, Mother, Daughter, Widow, and indeed Meretrix, as it shuts its bosom against no one seeking it. The form of the church conforms to that of Solomon’s temple, in the anterior part of which the people heard and prayed, while the clergy prayed and preached, gave thanks and ministered, in the sanctuary or sacred place. Solomon’s temple in turn was modelled on the Tabernacle of the Exodus, which, because it was constructed on a journey, is the type of the world which passes away and the lust thereof. It was made with the four colours of the arch of heaven, as the world consists of the four elements. Since God is in the world, He is in the tabernacle (which also means the Church militant) and in the midst of the faithful congregation. The anterior part of the tabernacle, where the people sacrificed, is also the _Vita activa_, in which the laity labour in neighbourly love; and the portion where the Levites ministered is the _Vita contemplativa_. The church should be erected in the following manner: the place of its foundation should be made ready--well-founded is the house of the Lord upon a rock--and the bishop or licensed priest should sprinkle it with holy water to dispel the demons, and should lay the first stone, on which should be carved a cross. The head of the church, that is the chancel, should be set toward the rising sun at the time of the equinox. Now if the Jews were commanded to build walls for Jerusalem, how much more ought we to build the walls of our churches? The material church signifies the Holy Church built of living stones in heaven, with Christ the corner-stone, upon which are set the foundations of Apostles and Prophets. The walls above are the Jews and Gentiles, who believing come to Christ from the four quarters of the world. The faithful people predestined to life are the stones thereof.