Starting in the Middle Ages, a Masonic trestle board was a design board that the Master Workman (architect) used to draw his plans and designs upon to give the stonemasons on a project an outline of each days’ work to be performed. In today’s terms, we might instead call it a “blueprint“.
Today, that same term, now referred to as a “Trestleboard“, is a newsletter, usually published monthly for the members of Masonry, providing news, inspiration and direction.