Tripoli (Greek: Τρίπολη, Trípoli, formerly Τρίπολις, Trípolis; earlier Τριπολιτσά Tripolitsa) is a city in the central part of the Peloponnese, in Greece. It is the capital of the Peloponnese region as well as of the regional unit of Arcadia. The homonym municipality has around 47,000 inhabitants.
In the Middle Ages the place was known as Drobolitsa, Droboltsá, or Dorboglitza, either from the Greek Hydropolitsa, ‘Water City’ or perhaps from the South Slavic for ‘Plain of Oaks’. The association made by 18th- and 19th-century scholars with the idea of the “three cities” (Τρίπολις, τρεις πόλεις “three cities”: variously Callia, Dipoena and Nonacris, mentioned by Pausanias without geographical context, or Tegea, Mantineia and Pallantium, or Mouchli, Tegea and Mantineia or Nestani, Mouchli and Thana), were considered paretymologies by G.C. Miles. An Italian geographical atlas of 1687 notes the fort of Goriza e Mandi et Dorbogliza; a subsequent Italian geographical dictionary of 1827 attributes the name Dorbogliza to the ruins of Mantineia (Mandi) and states that it is located north of Tripolizza.
The Ottoman Turks referred to the town and the district as Tripoliçe.