Tiberius was the second Roman Emperor, ruling from 14 AD to 37 AD. He was known for his weird fetishes when he retired to Capri. Caligula was the third Emperor and was known for his erratic behavior. Claudius was the fourth Emperor. Nero was the fifth Emperor, originally named Lucius Domitus Ahenobarbus. He passed laws allowing him to kill opponents, was blamed for starting the Great Fire of Rome, and was eventually forced to commit suicide. After the fire, Nero built the extravagant Domus Aurea palace.