Ge'ez language
Between the fourth and eleventh centuries AD, the Ge'ez language was the main language of the Axumite empire, and for some time thereafter it remained the language of literature. This literature, shared between Eritrea and Ethiopia, consisted mainly of historical tales about royalty and noblemen; ecclesiastical works, often in translation; and religious poetry. Ge'ez passed down to modern Tigrinya the Ge'ez alphabet and a substantial vocabulary.