The lecture and workshop series on Practice Theory aims to develop a new perspective on media history and media analysis. It is giving primacy to “practice” while focussing on processes of media production and work. We set out exploring media practices related to “coordination”, “delegation”, “registration & identification”, both with regard to a sound empirical foundation and to theoretical reflection. These categories are used to investigate media practices that specifically interconnect publics and infrastructures. Our lecture and workshop series on Practice Theory is dedicated to “Theoretical Empiricism” and will assemble international research that addresses questions of theory and empirical research symmetrically. For this purpose, three further categories are brought into play as part of the practice turn, namely repair work, experimentation, and actualization.