»Interreligious Instruction in Schools: (Im)possible?«: The study addresses the question of whether and in what form the legal structure of denominational religious instruction in the Austrian school system enables the implementation of interreligious educational concepts. In addition, it is shown to what extent the Catholic concept of education in general and the tasks and goals ascribed by the Church to Catholic religious instruction in schools in particular are compatible with the basic idea of interreligious learning concepts.