<!doctype html public «-//w3c//dtd html 4.0 transitional//en»> http-equiv=content-type> This volume examines the multifaceted origins of Paul Tillich’s “critical theology” during the Frankfurt years (1929–1933) from the perspectives of source and reception history. In this way, it provides a compelling picture of the rich interactions between Tillich and his academic environment as well as the spiritual situation at the University of Frankfurt just before the National Socialist takeover.