Bielefeld University has the largest department of sociological theory in the German-speaking area and the largest sociological department in Germany. Traditionally, a primary focus has been on Niklas Luhmann’s systems theory, and although research and teaching interests are changing and pluralizing all the time, this particular focus continues to play a major role at Bielefeld University. Theorists are the thinkers among the sociologists, so for those who want to learn and practice stringent theoretical thought Bielefeld is just the right place.