I'm sure anons have made threads like this before asking for recommendations. Instead, I'll bring 3 of my own recommendations.

To start it off:

Anna Komnene - Futaba Sato
>A manga that follows the life of Anna Komnene, daughter of Emperor Alexios Komneos and Empress Irene Doukaina. She was the author of "Alexiad", a historical work detailing the reign of her father, his appeal to the Western powers for a crusade against the Seljuk Turks, the Komnenian restorian, and her plot to depose her brother John II in favor of her husband Nikephoros Bryennios.