The ancient city of Corfu, known as
Korkyra, took part in the
Battle of Sybota which was a catalyst for the
Peloponnesian War, and, according to Thucydides, the largest naval battle between Greek city states until that time.
Thucydides also reports that Korkyra was one of the three great naval powers of fifth-century-BC Greece, along with
Athens and
Corinth. Medieval castles punctuating strategic locations across the city are a legacy of struggles in the Middle Ages against invasions by pirates and the Ottomans. The city has become known since the Middle Ages as
Kastropolis (Castle City) because of its two castles. From 1386 to 1797, Corfu was ruled by Venetian nobility; much of the city reflects this era when the island belonged to the
Republic of Venice, with multi-storied buildings on narrow lanes. The Old Town of Corfu has clear Venetian influence. The city was subjected to four notable sieges in
1537, 1571, 1573 and
1716, in which the strength of the city defenses asserted itself time after time, mainly because of the effectiveness of the powerful Venetian fortifications. Writer
Will Durant claimed that Corfu owed to the
Republic of Venice the fact that it was the only part of Greece never conquered by the Ottomans. In 2007, the old town of the city was inscribed on the
UNESCO World Heritage List. The municipal unit of Corfu city has a land area of and a total population of 40,047 inhabitants. Besides the city of Corfu/Kérkyra, its largest other towns are
Kanáli (population 4,786),
Potamós (3,840), Kontókali (1,660),
Alepoú (3,149), and Gouviá (838). ==Palaiopolis==