Gerrit Cornelis Berkouwer (1903-1996) was a minister of the Reformed Church in the Netherlands (GKN) and a Christian theologian. He was the chair of Systematic Theology at the Free University of Amsterdam, and a prolific author. While critical of the teachings of Karl Barth, Klaas Schilder, and Roman Catholicism, he is also known for leading the ecumenical movement of his day.