During its explosive growth from 1790 to the end of the 1820s Masonic brethren produced iconic architecture, as well as extraordinary examples of folk art, expressed in large symbolic paintings ("tracing boards"), murals, textiles, and graphics. Most of these have remained entirely unknown outside the Upstate Lodges that, against all hazards, have preserved them. Their symbolism seems mysterious and confusing to outsiders, but once explained, it gives insight into a period and place unique in American history. Joscelyn Godwin is professor of music at Colgate University. Christian Goodwillie is director and curator of Special Collections, Burke Library, Hamilton College. Marianita Peaslee is the digital imagery specialist, Burke Library, Hamilton College.