While showing off the Temple Room, where the Supreme Council meets and where Dan Brown's book begins, Morris admitted that the Mason fraternity makes for a great topic for conspiracy theorists.
"Yes, being an organization which has a history in the United States of almost 300 years, in Europe going back to written records of 1390, we're an old organization," he said. "People have always been curious about us. What are they doing behind closed doors? Why won't they let anyone into their meetings? And so wild speculation is out there about the Masons. And so what a wonderful plot device."
The Masons offer a tour of their headquarters Monday through Thursday from 10 a.m to 4 p.m., and they say thousands of visitors come through every year. Morris says he welcomes the attention, but he's not sure they can handle what is sure to be an increase in visitors to the headquarters.
"We're easily able to handle several thousand visitors a year, I don't know about tens of thousands of visitors per year," he said.
Some Freemasons are welcoming the attention that Brown's book is sure to bring to them, but they are also well aware that "The Da Vinci Code" was less than flattering to the Catholic Church.
It's unclear how Brown's book will portray the Masons, Morris said. "It could be a tremendous membership boost for us, it could be awful -- people could stay away in droves," he said. "We don't know, so we're going to just try to keep calm."