The foundation of a speculative science upon an operative art, and the symbolic use and explanation of the terms of that art, for purposes of religious or moral teaching constitute another Landmark of the Order. The Temple of Solomon was the cradle of the institution, and, therefore, the reference to the operative Masonry which constructed that magnificent edifice to the materials and implements which are employed in its construction and to the artists who were engaged in the building, are all component and essential parts of the body of Freemasonry, which could not be subtracted from it without an entire destruction of the whole identity of the Craft. Hence, all the comparatively modern rites of Freemasonry, however they may differ in other respects, religiously preserve this temple history and these operative elements, as the substratum of all their modifications of the Masonic system.