Pertinax (Latin: Publius Helvius Pertinax Augustus; 1 August 126 – 28 March 193) was Roman Emperor for the first three months of 193. Successor to the assassinated Commodus, he was the first to serve as emperor during the tumultuous Year of the Five Emperors. Born the son of a freed slave, Pertinax originally worked as a teacher before becoming an officer in the Roman legion.