The project “Psychiatric Categories as Traveling Objects: The Morphology of Categories of Mental Illness in Social Work Contexts”, financed by the Deutsche Forschungsgemeinschaft (DFG) and under the supervision of Prof. Dr. Heinz Bude, began in March 2018 at the Faculty of Social Sciences at the University of Kassel. The project explores the practices through which non-psychiatric disciplines solidify psychiatric disease categories. Taking up the debate on the massive expansion of psychiatric diagnoses, it aims to study the path these disease categories take from their academic and medical production through institutional arenas in situations of social work, education, and consulting to individual and private contexts. The project uses the concept of traveling objects to analyze psychiatric categories, showing how institutions and individuals develop and pass them on, how they structurally shift on their path through strategic contexts, and how they can take on lives of their own.