Tripoli is a city of about 25,000 inhabitants in the central part of the Peloponnese

Peloponnese

The Peloponnese, Peloponnesos or Peloponnesus , is a large peninsula , located in a region of southern Greece, forming the part of the country south of the Gulf of Corinth...

, in Greece

Greece

Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

. It is the capital of the prefecture of Arcadia

Arcadia

Arcadia is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological character Arcas. In Greek mythology, it was the home of the god Pan...

 and the centre of the municipality of Tripolis, pop. 48,000.
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

South Slavic languages

The South Slavic languages comprise one of three branches of the Slavic languages. There are approximately 30 million speakers, mainly in the Balkans. These are separated geographically from speakers of the other two Slavic branches by a belt of German, Hungarian and Romanian speakers...

 for 'Plain of Oaks'.
Modern Tripolis was created in 1770 near the ruins of the ancient cities of Pallantion, Tegea

Tegea

Tegea was a settlement in ancient Greece, and it is also a former municipality in Arcadia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Tripoli, of which it is a municipal unit. Its seat was the village Stadio....

, and Mantinea, hence its name Τρίπολις = τρεις πόλεις 'three cities'.