The Olympian Gods resided on Mount Olympus according to Greek Mythology. That was their home residence. There are 12 Greek Gods and all of them besides Hades and his wife Persephone. Hades resides in the underworld. While Persephone resides in Olympus 6 months out of the year and 6 months in the underworld. The twelve Greek Gods are Zeus, Hera, Poseidon, Demeter, Athena, Apollo, Artemis, Ares, Hephaestus, Aphrodite, Hermes, and Dionysus.
One reason why this is believable is because di Coppo Di Stefano Buonaiuti was in Florence at the time when the Black Death hit Florence in 1338. One reason why this passage isn't believable is because he was only two when it happened so might not remember it all.