Achilles in the fifth century BC, Pindar had mentioned a cult of Achilles on a "bright island" (φαεννά νᾶσος, "phaenná nâsos") of the Black Sea, while in another of his works, Pindar would retell the story of the immortalized Achilles living on a geographically indefinite Island of the Blest together with other heroes such as his father Peleus and Cadmus. Well known is the connection of these mythological Fortunate Isles (μακαρῶν νῆσοι, "makárôn nêsoi") or the Homeric Elysium with the stream Oceanus which according to Greek mythology surrounds the inhabited world, which should have accounted for the identification of the northern
Greek mythology subterranean house of Hades and his predecessors, home of the dead. Influences from other cultures always afforded new themes. According to Classical-era mythology, after the overthrow of the Titans, the new pantheon of gods and goddesses was confirmed. Among the principal Greek gods were the Olympians, residing on Mount Olympus under the eye of Zeus. (The limitation of their number to twelve seems to have been a comparatively modern idea.) Besides the Olympians, the Greeks worshipped various gods of the countryside, the satyr-god Pan, Nymphs (spirits of rivers), Naiads (who dwelled in springs), Dryads (who were spirits of the trees),