Apollo, the only god who retained his original name after being transferred from the Greek to the Roman religious system. Many people in later generations only knew that Apollo was the sun god in ancient Greek mythology, but in the Greek legends, Apollo was the god or arts. It was not until the fifth century BC that Apollo was accorded the title "god of sun and light". After the Romans included Apollo into their religious system, they did not give him a new name like they did to other Greek gods. And in the evolution of mythology, Apollo was recognized as the god of music, healing, prophecy, the sun and light, and so on. In the Roman mythological system, Apollo's multiple roles reflected the level of imagination of people from that period.
It also mirrored the collapse of the divine realm.