Look for information online about the departments and their courses offered as well as about the university's and the graduate schools' main areas of research
Get information on studying in Germany and on admission requirements
Contact the ISGS (RefIntA) and provide the office with your previous academic qualifications and desired field of research
2. Contact Your Department
Get in touch with the respective department
Obtain approval to pursue your desired research topic
Find a professor who will supervise your doctoral work
Obtain consent from the department to pursue a doctoral program