Which Roman emperor was personally known by or written about by both Thrasyllus of Mendes and Tacitus?
Tacitus:  The surviving portions of his two major works—the "Annals" and the "Histories"—examine the reigns of the Roman emperors Tiberius, Claudius, Nero, and those who reigned in the Year of the Four Emperors (69 AD).
i don't know