The Kebra Nagast, by E.A. Wallis Budge, [1932], at sacred-texts.com
19. How this Book came to be found
And DĔMÂTĔYÔS (the Patriarch TIMOTHEUS (?) who sat from 511 to 517), the Archbishop of RÔM (i.e., CONSTANTINOPLE, BYZANTIUM), said, "I have found in the Church of [Saint] SOPHIA among the books and the royal treasures a manuscript [which stated] that the whole kingdom of the world [belonged] to the Emperor of RÔM and the Emperor of ETHIOPIA."