Pieria (Greek: Πιερία) is one of the regional units of Greece located in the southern part of the Region of Central Macedonia, within the historical region of Macedonia. Its capital is the town of Katerini. Pieria is the smallest regional unit within Macedonia. The name Pieria originates from the ancient tribe Pieres and the ancient country of Pieris. In Pieria, there are many sites of archeological interest, such as Dion, Pydna and Platamonas. Pieria is also home to Mt. Pierus where Hermes launches himself from to visit Calypso (Odyssey 5.50), home to Orpheus and the Muses, as well as the Pierian Spring. Mt. Olympus, the highest mountain in Greece and throne of the ancient Greek gods, is located in the southern part of Pieria. Other ancient cities included Leibethra and Pimpleia.