This group’s buildings contain three “immovable” and three “movable” jewels, such as the emblem-decorated “trestle-board.” Confederate general Albert Pike collected essays about this group into a book about the Morals and Dogma of one of its Rites. Albert Mackey documented twenty-five “landmarks” of this group, including their separation into three “degrees” (10[1])and their belief in a subordinate of Solomon named Hiram Abiff. The letter “G” is sometimes placed in the center of the “square (10[1])and compasses” symbol used by this group. This group’s “operative” origins gave way to a “speculative” focus on symbols such as the Eye of Providence. A “Grand Master” oversees (10[1])meetings for members of this group at “Grand Lodges.” For 10 points, name this fraternal organization originating from guilds of stoneworkers. ■END■