Emperors Augustus and Darius were perceived as semi-divine rulers. Persian and Roman religious philosophies were similar as they were both polytheistic, but later the Romans adopted Christianity, which was influenced by Zoroastrianism. Both of these theological concepts are based on salvation, heaven and hell. Although the Persian and Roman empires were centralized and bureaucratic, the system of government they incorporated was very different from each other. A key similarity between Persia and Rome was that one set of laws was used as an attempt to maintain peace in their respective kingdoms. By far, these empires were very similar in the infrastructure they used to maintain communications, transport food, and obtain water for consumption and agriculture. Overall, it is quite surprising that the Persian and Roman empires had many of them