Relating to Freemasonry, a fraternal organization with secret rituals, or relating to brickwork and stonework.
From Masonry (the organization) or mason (a stone worker). The capital-M version refers to Freemasonry; lowercase relates to construction. Both derive from Old French 'mason' meaning builder.
Masonic symbols are everywhere in architecture and design—the all-seeing eye on the dollar bill fascinates people partly because Freemasonry's secrecy creates mystery, but it's really just a professional guild that went fancy!
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