While you're technically correct, you're still incorrect. The area devastated by the Great Fire (allegedly started by Nero) was used to build Nero's Golden Hou

While you're technically correct, you're still incorrect. The area devastated by the Great Fire (allegedly started by Nero) was used to build Nero's Golden House (Domus Aurea) first. After his death, most of the Golden House complex was demolished and it was only then that the infilled artificial lake of the Golden House was chosen as the site for the Colosseum.