This paper reconstructs the major transformations in the Marburg neo-Kantian account of experience. By focusing on the problem of ‘conceptualism’, it traces connections between four issues that are central to the transcendental projects of the Marburg philosophers: the interpretation of Kant, the critique of experiential givenness, the account of objective cognition in science, and the relation between scientific and pre-scientific experience. My historical narrative identifies two shifts. The first is from Cohen's conceptualist answer to the threat of subjectivism to Cassirer's (...) functionalist answer to empiricism. The second is from Cassirer's conceptualism about scientific experience to his symbolic non-conceptualism about everyday perception. My reconstruction reveals the fate of neo-Kantian conceptualism to be linked to the fate of pre-scientific perception and suggests that the continuing significance of the Marburg philosophers lies in their responses to the coming apart of the manifest and the scientific image. (shrink)