This emperor’s original cognomen came from an ancestor whose beard supposedly turned reddish-bronze after Castor and Pollux stroked it. This emperor agreed to a peace treaty in which Tiridates I became king of Armenia, but had to travel to Rome for his crown. This emperor was praised in graffiti along with his wife Poppaea after he imposed height (10[1])limits on tenements. When the Praetorian Guard under Tigellinus switched sides to Galba, this emperor committed suicide and the Year of the Four Emperors began. (10[3])This final Julio-Claudian emperor (10[1])ordered the death of his mother Agrippina (10[1])the Younger and his tutor Seneca. For 10 points, which emperor persecuted Christians (10[1])after (10[1])the Great Fire (10[1])of Rome? ■END■