Secret passages, also commonly referred to as hidden passages or secret tunnels, are hidden routes used for stealthy travel, escape, or movement of people and goods. They are sometimes inside buildings leading to secret rooms.

Ronald Arbuthnott Knox was an English Catholic priest, theologian, author, and radio broadcaster. Educated at Eton and Balliol College, Oxford, where he earned a high reputation as a classicist, Knox was ordained as a priest of the Church of England in 1912. He was a fellow and chaplain of Trinity College, Oxford until he resigned from those positions following his conversion to Catholicism in 1917. Knox became a Catholic priest in 1918, continuing in that capacity his scholarly and literary work.