From Wikipedia:

"Whilst it is recognized that Masonry is not atheistic (Masons aligned with the United Grand Lodge of England are asked if they believe in God or another supreme being before joining and only accept candidates that do),[17] its use of the expression Supreme Architect of the Universe—a term attributed to the Protestant theologian John Calvin—is seen by some Christian critics as indicating Deism, the belief that God created the Universe but did not intervene in the world after this."

"Supreme Architect of the Universe" was a convenient dodge in the 18th century world where living people could still recall the Witch Trials.