Freemasons celebrate 300 years since their foundation in England in 1717. Today still, despite the Catholic Church's prohibition, some Catholics in apparent good faith become masons, even on the advice of senior clergy. Evidence suggests freemasonry remains strong in some Anglican churches and cathedrals. This updated edition looks at what Freemasonry is and what the Catholic Church teaches about it. It examines the place of freemasonry within contemporary British society. The convincing theological arguments against becoming a freemason are set out in a measured and balanced manner, supported by excellent research and extensive endnotes.