Francis August Schaeffer was an American evangelical theologian, philosopher, and Presbyterian pastor. He co-founded the L'Abri community in Switzerland with his wife Edith Schaeffer, née Seville, a prolific author in her own right. Opposed to theological modernism, Schaeffer promoted what he claimed was a more historic Protestant faith and a presuppositional approach to Christian apologetics, which he believed would answer the questions of the age.

L'Abri is an evangelical Christian organisation which was founded on June 5, 1955 by Francis Schaeffer and his wife Edith in Huémoz-sur-Ollon, Switzerland. They opened their alpine home as a ministry to curious travelers and as a forum to discuss philosophical and religious beliefs. Today, L'Abri houses in various parts of the world continue to offer people a place to stay when they travel.