Nafplio is a seaport town in the Peloponnese in Greece that has expanded up the hillsides near the north end of the Argolic Gulf. The town was an important seaport held under a succession of royal houses in the Middle Ages as part of the lordship of Argos and Nauplia, held initially by the de la Roche following the Fourth Crusade before coming under the Republic of Venice and, lastly, the Ottoman Empire. The town was the capital of the First Hellenic Republic and of the Kingdom of Greece, from the start of the Greek Revolution in 1821 until 1834. Nafplio is now the capital of the regional unit of Argolis.
The name of the town changed several times over the centuries. The modern Greek name of the town is Nafplio.
During the Classical Antiquity, it was known as Nauplia in Attic Greek and Naupliē in Ionian Greek. In Latin, it was called Nauplia.
During the Middle Ages, several variants were used in Byzantine Greek, including Náfplion (Ναύπλιον), Anáplion (Ἀνάπλιον), and Anáplia (Ἀνάπλια).
During the Late Middle Ages and early modern period, under Venetian domination, the town was known in Italian as Napoli di Romania, after the medieval usage of «Romania» to refer to the lands of the Byzantine Empire, and to distinguish it from Napoli (Naples) in Italy.
Also during the early modern period, but this time under Ottoman rule, the Turkish name of the town was Mora Yenişehir, after Morea, a medieval name for the Peloponnese, and «yeni şehir,» the Turkish term for «new city» (apparently a translation from the Greek Νεάπολη, Italian Napoli). The Ottomans also called it Anabolı.
In the 19th century and early 20th century, the town was called indiscriminately Náfplion (Ναύπλιον) and Nafplio (Ναύπλιο) in modern Greek. Both forms were used in official documents and travel guides. This explains why the old form Náfplion (sometimes transliterated to Navplion) still occasionally survives up to this day.