The Romans assimilated many elements of other societies into their culture, including the mythology and gods of the Greeks. This practice is called syncretism which means the blending or fusion of religious beliefs and practices to form a new system.
Mythology of the Roman Gods and Mount Olympus - Cosmogony
The Mythology surrounding the Gods on Mount Olympus
It was also in the great hall of the palace of the Olympian king that the gods feasted each day on ambrosia and nectar, their food and drink, the latter being handed round by the Roman goddess Juventas. It was in the palace on Mount Olympus that the Roman gods and goddesses discussed the affairs of heaven and earth. As they feasted upon their nectar, Apollo, the god of music, delighted the gods with the tones of his lyre, to which the muses sang in responsive strains. When the sun was set, the gods retired to sleep in their respective dwellings on Mount Olympus, the earth, the sea or the underworld. The principal Roman divinities were the Olympic gods including Jupiter, Juno, Mars, Minerva, Neptune, Vesta, Apollo, Venus, Ceres and Diana.