The Peloponnese, Peloponnesos, or Peloponnesus is a large peninsula and geographic region in southern Greece. It is separated from the northern part of the country by the Gulf of Corinth. During the late Middle Ages and the Ottoman era, the peninsula was known as the Morea (Greek: Μωρέας), a name still in colloquial use in its demotic form (Μωριάς).
The peninsula is divided among three administrative regions: most belongs to the Peloponnese region, with smaller parts belonging to the West Greece and Attica regions.
It was here that the Greek War of Independence began, and the Peloponnesians have almost totally dominated politics and government in Greece since then.
The Peloponnese is a peninsula that covers an area of some 21,549.6 square kilometres (8,320.3 sq mi) and constitutes the southernmost part of mainland Greece. While technically it may be considered an island since the construction of the Corinth Canal in 1893, like other peninsulas that have been separated from their mainland by man-made bodies of waters, it is rarely, if ever, referred to as an "island". It has two land connections with the rest of Greece, a natural one at the Isthmus of Corinth, and an artificial one by the Rio-Antirio bridge (completed 2004).
The peninsula has a mountainous interior and deeply indented coasts. Mount Taygetus is its highest point, at 2,407 metres (7,897 ft). It possesses four south-pointing peninsulas, the Messenian, the Mani, the Cape Malea (also known as Epidaurus Limera), and the Argolid in the far northeast of the Peloponnese.
Two groups of islands lie off the Peloponnesian coast: the Argo-Saronic Islands to the east, and the Ionian to the west. The island of Kythera, off the Epidaurus Limera peninsula to the south of the Peloponnese, is considered to be part of the Ionian Islands.