The magnificent innards of Boston’s Grand Lodge of Masons dazzle the eight BU students on a recent visit: the vast meeting halls with their triplicate sets of wooden thrones, upholstered tiers of seating, and central altars with cushioned tops, the exquisitely sculpted ceiling of Corinthian Hall, and the tiny hand-laid Italian tiles on the floors.

Then, in the library, tour guide Walter Hunt, grand historian of the lodge, asks for questions. “I have a quick question,” pipes up Leah Turner (CAS’16). “There’s a document over here with a lock of hair attached to it.”

The hair belonged to a deceased 19th-century Mason and was attached to his membership diploma in a memorial not unusual for that time, Hunt explains. In fact, when loyal Mason George Washington died, the Massachusetts Grand Lodge successfully petitioned Martha Washington for a lock of his hair, now stored in an urn made by Paul Revere (who once served as grand master of the lodge) and brought out whenever a new lodge grand master is installed. “It’s probably the most valuable artifact we possess,” Hunt says.

From the sublimity of its architecture to the idiosyncrasy of its hair samples, Freemasonry (founded in 18th-century England and devoted to charitable works) is part of the syllabus for Mystic Orders and Secret Societies: Fraternalism in America. Taught by William Moore (GRS’99), a College of Arts & Sciences associate professor of American material culture, the class covers other groups, among them the Daughters of the American Revolution, the Knights of Labor (a late 19th-century labor organization), the Grand Army of the Republic (a fraternal organization of veterans of the Civil War Union Army, whose Lynn, Mass., hall the class also visits), and various African American and women’s organizations.

As you might have guessed from the Masons’ wide open tour for Moore’s class, the secrecy in secret societies depends on your definition of the word secret. Their rituals and activities, Moore says, arose before the internet and social media (even advertising) were around to publicize them. (Membership has its privileges in terms of viewing certain rituals and artifacts the public doesn’t see, such as Washington’s locks.) The syllabus includes a photo of Shriners (who are affiliated with the Masons) bedecked in their organization’s robes and headgear. Moore, who directs BU’s American & New England Studies Program, says his course serves up an academic answer to the obvious question: “Here are these guys dressed up in funny coats. What the hell is that about?”

“We tend to think of fraternal organizations as being silly—as being Fred Flintstone and the Water Buffalos or Jackie Gleason with the Raccoons,” he says. “But in much of American history, fraternal organizations played extremely important roles in culture and in society and in how people defined themselves.…My argument is that if you overlook fraternal organizations, you’re missing out on a lot of different understandings of how we got here as Americans.”

In a timely reminder of these groups’ ongoing role in contemporary America, when Supreme Court Justice Antonin Scalia died in February, he was with brothers in an exclusive hunting fraternity, the International Order of St. Hubertus (a group not studied in Moore’s class). More than a magnet for influential public figures from Washington to Scalia, fraternal groups have played a broader part in the nation’s politics, the course argues.