Augustus Caesar, was the first Emperor. He is considered as the founder of Rome Empire.
"The name of Augustus was the title of honour given by the Romans to the emperor Caius Julius Cassar Octavianus, or, as he was originally designated, Caius Octavius. This title was intended to be hereditary in his family, but all the succeeding Caesars or emperors of Rome continued to adopt it, long after they had ceased to be connected with the first Augustus by blood. The era of Augustus formed an illustrious epoch in Roman history, and was distinguished for its splendid attainments in arts and arms, and more especially in literature. The Romans in later times looked back to the age of Augustus with great complacency, as the most prosperous and the most distinguished in their annals. (Encyclopædia Britannica)