rencontre brehal studied mathematics and philosophy in Cologne, Bochum, Darmstadt. In 2004 he became Professor for Media Theory and Media Science at the University of Potsdam. Since 2013 he is Head of the Institute for Theory at ZHdK Zurich and visiting professor at University Potsdam, where he is one of the chairs of the DFG Research Training Centre ›Visibility and Visualization – Hybrid Forms of pictorial Knowledge‹. Dieter Mersch was a visiting professor in Chicago, Budapest and Luzern, and Fellow at IKKM Weimar and at ZHdK Zurich. His work focuses on media philosophy, aesthetics and art theory, semiotics, hermeneutics, post-structuralism and philosophy of the image and language.