Pillars of Enoch
The outer pillars of the temple are called the "Pillars of Enoch". Enoch, fearing that the principles of the Arts and Sciences might be lost, erected two pillars, the one of marble to withstand fire, the other of brass to resist water. On each he engraved all the knowledge which he feared would be lost. The globes are symbols of unity, peace and plenty. These pillars also support the "Rainbow" which is sometimes associated with the Holy Royal Arch. It is also called the "Arch of Heaven", symbolic of the architectural arch.
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This page is adapted from the Glossary at Phoenixmasonry — Used with permission.