Look for a particular historian versed in the area that you think you might want to study if you something particular in mind, don't necessarily look at the university itself (although yes this is important for other reasons). If you develop a good relationship with a professor like that it will open doors for you as you move up. Just make sure you put the work in and pay your dues so to speak. Also if you don't like writing a lot and reading a lot (a book or multiple in one week) and studying languages I wouldn't recommend it.