屋大维, also known as 奥古斯都, was the first Roman emperor, ruling from 27 BC until his death in AD 14. He was born as Gaius Octavius on September 23, 63 BC, and was the adopted heir of 尤利乌斯·凯撒. His reign marked the end of the Roman Republic and the beginning of the Roman Empire. 屋大维 is known for establishing a period of relative peace known as the 和平时代, which lasted for over two centuries. He implemented various reforms in administration, finance, and military, which helped stabilize and expand the empire. His legacy includes significant cultural and architectural achievements in Rome.