The article introduces a special section about history of science in Central and Eastern Europe before and after the fall of Communism, and sketches a conceptual framework within which the three papers in the section can be understood together. This introduction provides information about the workshop from which the papers were recruited, and continues with more general considerations on the nationalization of scientific knowledge in the territories of the Habsburg empire and its successor states. In the second half of the (...) introduction, themes addressed by all three papers in the special section are named and discussed briefly. (shrink)