a naumachia on the right bank of the Tiber, constructed by Philippus Arabs and his son in 247 A.D., when the one
thousandth anniversary of the founding of Rome was celebrated (Aur.
Vict. Caes. 28). This may have been only a restoration of the naumachia
Augusti, which in that case would have lasted a century longer and been
one of the two naumachiae of the Notitia (HJ 653-654).