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 (10[1])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 (10[1])after he imposed height limits on tenements. When the Praetorian Guard under Tigellinus switched sides to Galba, this emperor committed suicide (-5[1])and the Year of the Four (10[1])Emperors began. (10[2])This final (10[2])Julio-Claudian (10[1])emperor (10[2])ordered the death of his mother Agrippina the Younger and his tutor Seneca. For 10 points, which emperor persecuted Christians after the Great Fire (10[1])of Rome? ■END■ (10[1])