Francis Turretin was a Swiss-Italian Protestant theologian. Turretin is especially known as a zealous opponent of the theology of the Academy of Saumur (embodied by Moise Amyraut and called Amyraldianism), as an earnest defender of the Calvinistic orthodoxy represented by the Synod of Dort, and as one of the authors of the Helvetic Consensus, which defended the formulation of double predestination from the Synod of Dort and the verbal inspiration of the Bible.

      Turretin greatly influenced the Puritans, but until recently, he was a mostly forgotten Protestant scholastic from the annals of church history, though the rough English translation of his Institutes of Elenctic Theology is increasingly read by students of theology. John Gerstner called Turretin "the most precise theologian in the Calvinistic tradition."