Karl Barth (; German: [bart]; (1886-05-10)10 May 1886 – (1968-12-10)10 December 1968) was a Swiss Reformed theologian. Barth is best known for his commentary The Epistle to the Romans, his involvement in the Confessing Church, including his authorship (except for a single phrase) of the Barmen Declaration, and especially his unfinished...