Byzantinist
[ biz-uh n-tee-nist, -tahy-, bahy-zuh n-, bih-zan-tuh- ]
/ ˈbɪz ən ti nɪst, -taɪ-, ˈbaɪ zən-, bɪˈzæn tə- /
noun
an authority on or student of the history and culture of the Byzantine Empire.