All of the extant Greek manuscripts of Galen were copied by Byzantine scholars .
However , in general , Galen and the ancient Greek medical tradition continued to be studied and followed in the Eastern Roman Empire , commonly known as the Byzantine Empire .
All of the extant Greek manuscripts of Galen were copied by Byzantine Empire scholars .
However , in general , Galen and the ancient Greek medical tradition continued to be studied and followed in the Eastern Roman Empire , commonly known as the Byzantine Empire .