Final answer:
Ancient Romans believed that their city was founded by divine intervention, specifically by the twin brothers Romulus and Remus, sons of Mars, the god of war.
Step-by-step explanation:
Ancient Romans believed that their city was founded by divine intervention. According to Roman tradition, the city was founded in 753 BCE by the twin brothers Romulus and Remus, sons of Mars, the god of war. This belief in divine intervention reflected their religious beliefs and helped establish stability and social order among the Romans.