Erasmus exchange places are subject-specific, i.e. students from the Erasmus participating countries can only complete an Erasmus stay at the Ruhr University if an Erasmus Inter-Institutional Agreement exists between the home university and Ruhr University in your subject.
You would like to study at our university for one or two semesters with an Erasmus grant?
Here you can check if there is an Erasmus-Agreement between your home university and ours: