Later Roman emperors inherited the honorific augustus, and it became their main title. The principate set up in his reign, with nominal deference to the Senate, lasted until the Crisis of the Third Century.
Based on Wikipedia: Augustus
Future Roman emperors inherited the honorific augustus, and it became their main title.
The principate, a style of government in which the emperor showed nominal deference to the Senate, was established during his reign and lasted until the Crisis of the Third Century.