What are the symbols used in Royal Arch Masonry?

The triple tau, formed by three tau crosses conjoined at their feet, serves as the principal emblem and badge of the Order 1. Historically derived from the single tau cross as a symbol of preservation and eternal life, the triple tau in its Royal Arch combination is interpreted by Albert C. Mackey as a mark distinguishing those who know the true Divine Name 1. Old English lectures also connected the angles formed by its intersecting lines to the five Platonic bodies representing the four elements and the universe 1.

On the Royal Arch apron prescribed in the American system, this badge appears inside a triangle enclosed by a circle, set upon the flap of a lambskin bound in scarlet 1. Red or scarlet is the characteristic color of the Order, representing fervency and zeal 1.

The interior of the Royal Arch Tabernacle incorporates four veils colored blue, purple, scarlet, and white 1. Taken together as divisions of the Tabernacle, these veils symbolize the difficulties and obstacles that must be encountered and overcome in the search for Truth and spiritual illumination; individually, they represent distinct virtues 1. Chapter officers and their stations feature further scriptural devices, such as a white banner depicting a lion to represent the tribe of Judah, and a gold triangular plate inscribed with a sword 1.