 Today, in the English speaking world, Fleck is mostly considered to be an unappreciated forerunner of Thomas Kuhn’s theory of scientific revolutions. It is in the German speaking community of philosophers and sociologists of science that Fleck is considered to be a highly original epistemologist, who presents human knowledge in a quite peculiar and explorative way which significantly transcends Kuhn’s theses. In France there is a group of philosophers and historians of medicine—Ilana Löwy and others—who apply Fleck’s ideas in their research. In his famous introduction to the actor-network theory, Bruno Latour named Fleck “the founder of sociology of science” (Latour 2005, p. 112). In 2005 Ludwik Fleck Zentrum was founded in Collegium Helveticum, Zürich, led by Johannes Fehr until 2014; since 2015 the centre is managed by Hartmut von Sass. In Brazil Ludwik Fleck has influenced at least three different “thought collectives”: his theory is applied by historians of science, in teaching and learning science, and in philosophy (Condé 2016). There is a group of Serbian archaeologists who are inspired in their work by Fleck’s epistemology (Milosavljević 2016).