Nero also took an interest in the city. Citizens of Lugdunum contributed four million sesterces to the recovery after the Great Fire of Rome in 64 AD.. In the same year, the Lugdunum mint was closed an production shifted to Rome. A few years later, Nero contributed four million sesterces to the rebuilding of Lugdunum after a similarly devastating fire. Although the destructiveness of the fire is described in a letter from Seneca to Lucilius, archeologists have not been able to uncover a confirmatory layer of ash.