Abstract There are episodes in Marx’s life that go unnoticed or that are considered insignificant in Marxian scholarship. A case in point is that Marx wrote a treatise on Christian art between 1841 and 1842 and a group of excerpts (the Bonn Notebooks) on the history of religious art that resulted from it. The treatise and the accompanying notebooks are either completely absent from Marx biographies and studies on young Marx or they are mentioned only in passing; if the notebooks are considered at all, one portion is usually singled out while the rest is effectively ignored. The present piece traces Marx’s motives for occupying himself with religious art as well as his interests, shifting from Christian, Greek and Egyptian arts to fetishism and idolatry. This study intends to highlight that young Marx was more involved in questions concerning the political culture of aesthetics than we usually think. The Bonn Notebooks provide access to a more vivid image of Marx in this regard than previous scholarship has suggested.