One name I don't see here is "Heidegger". I remember hearing years ago that Tillich drew heavily on Heidegger, sometimes with little more alteration than swappi

One name I don't see here is "Heidegger". I remember hearing years ago that Tillich drew heavily on Heidegger, sometimes with little more alteration than swapping in "God" for "ground of being". Perhaps someone better acquainted with Tillich and Heidegger could weigh in?