Messene (Greek: Μεσσήνη Messini), officially Ancient Messene, is a local community of the municipal unit Ithomi, of the municipality of Messini within the regional unit of Messenia in the region of Peloponnese. Before 2011 it held the same position in the administrative hierarchy, according to Law 2539 of 1997, the Kapodistrias Plan, except that Ithomi was an independent municipality and Ancient Messene was a local division within it.
Most of the area of Ancient Messene contains the ruins of the large classical city-state of Messene re-founded by Epaminondas in 369 BC, after the battle of Leuctra and the first Theban invasion of the Peloponnese. Epaminondas invited the return to their native land of all the families that had gone into exile from Messenia during its long struggle with and servitude under the military state of Sparta, now finished as a conquering state. This new Messene, today’s Ancient Messene, was constructed over the ruins of Ithome, an ancient city originally of Achaean Greeks, destroyed previously by the Spartans and abandoned for some time.
Currently the substantial ruins are a major historical attraction. Much of it has been archaeologically excavated and partly restored or preserved for study and public viewing, as well as for various events. The site was never totally abandoned. The small village of Mavromati occupies what was the upper city around the fountain called klepsydra. Administrative structure and population figures refer primarily to it.