The naumachia of Domitian occupies the site of the present Piazza d'Espagna, and was larger and more ornamented.
"Titus Flavius Domitianus (Domitian) The Lives Of The Twelve Caesars, Volume 12."
C. Suetonius Tranquillus
So many ships had never before been engaged in any naumachia as were destroyed here in the sham sea-fight, no greater number of wild beasts had ever been seen together on any occasion even in the Roman Circus; and how bloody were the fights of the gladiators, in which black and white combatants afforded a varied excitement for both heart and senses.
"The Emperor, Part 2, Volume 9."
Georg Ebers
Every pillar and every statue was built round with a scaffolding reaching to the ceiling on which men were climbing and crowding each other just as the sailors climb into the enemy's ships in the naumachia."
"The Complete Historical Romances of Georg Ebers"
Georg Ebers