Roman and Byzantine period During the Roman Empire, the Ionian Islands were variously part of the
provinces of
Achaea and
Epirus vetus. These would form, with the exception of Cythera, the
Byzantine theme of
Cephallenia in the late 8th century. From the late 11th century, the Ionian Islands became a battleground in the
Byzantine–Norman Wars. The island of Corfu was held by the Normans in 1081–1085 and 1147–1149, while the Venetians unsuccessfully besieged it in 1122–1123. The island of Cephalonia was also unsuccessfully besieged in 1085, but was plundered in 1099 by the
Pisans and in 1126 by the Venetians. Finally, Corfu and the rest of the theme, except for Lefkada, were captured by the
Normans under
William II of Sicily in 1185. Although Corfu was recovered by the Byzantines by 1191, the other islands henceforth remained lost to Byzantium, and formed a
County palatine of Cephalonia and Zakynthos under William's
Greek admiral
Margaritus of Brindisi.
The '''' Following the Fourth Crusade and the signature of the '
, Corfu came under Venetian rule. In 1207 though, doge Pietro Ziani ceded the island as a ' to ten Venetian nobles, provided that they demonstrate loyalty and devotion and that they pay taxes. Corfu passed in the hands of the
Despotate of Epirus around 1214, and was captured in 1257 by
Manfred of Sicily, who put his
admiral Philippe Chinard there in charge of his eastern possessions. Nonetheless, with the defeat of Manfred at
Benevento and the signature of the
Treaty of Viterbo on 27 May 1267, Corfu became a possession of the
Angevin Kingdom of Naples. Meanwhile, the rest of the islands continued to form part of the County palatine, which throughout its existence was governed by three families: the Orsini (whose relation to the Roman
Orsini family is unattested), the
House of Anjou and the
Tocco family. The rule of the family of Tocco lasted for 122 years, up until 1479, when Ottomans captured Cephalonia, Zante, Lefkada and Ithaca. This was accomplished voluntarily by the people of Corfu. On 10 May, the Corfiotes appointed five ambassadors to submit to the Venetian senate. This attack led Venice to an alliance with the Pope and Emperor
Charles V, known as the
Holy League, against the Ottoman Empire. Another major unsuccessful Ottoman attack was
that of July 1716. After the partition of the Byzantine Empire in 1204, Cythera fell into Venetian hands in 1238 through the marriage of
Marco Venier with the daughter of the Greek lord of the island. Cythera and Anticythera constituted part of the '''' for the first time in 1363 followed by an interruption of a three-year Turkish rule,
between 1715 and 1718. With the
Treaty of Passarowitz Cythera and Anticythera passed to the Venetian Republic and remained under its control until its fall, in 1797. The Turkish rule in the three islands of Cephalonia, Zante and Ithaca was short-lived. In 1481, two years after the beginning of the Turkish rule, Antonio Tocco invaded and briefly occupied Cephalonia and Zante but he was soon driven out by the Venetians. Zante was officially recovered by the Venetians in 1485. Then, Cephalonia, after sixteen years of Turkish occupation (1484–1500), became part of the '''' on 24 December 1500, with the
Siege of the Castle of St. George. Ithaca had become depopulated and rewilded during the period of Turkish rule. In 1504, the Venetians ordered official the repopulation of Ithaca with tax incentives to attract settlers from neighbouring islands. However, according to historians, the island received a great population revival in the period before and after the fall of Khandaka (Heraclion) when numerous people from Crete arrived there as well as the noble Karavia family, a branch of the ancient
Kallergi family. This family and its followers inhabited settlements on the island, received fiefs from the Venetian Senate and indulged in a tremendously profitable maritime trade as well as piracy against the Ottomans. According to the French traveler Leake during the 18th century the families of Karavia (Latin: Caravia), Petalas and Dendrinos constituted the three main factions of the island, with the Karavia family controlling its most productive part. Lefkada, part of the
Despotate of Epirus since the latter's foundation in 1205, was incorporated by
Leonardo I Tocco into the County of Cephalonia in 1362. The Despotate of Epirus was one of the three Byzantine Empires in exile created after the Fourth Crusade in 1204. Following the fate of the other central Ionian Islands, it was captured by the Turks in 1479 and then by the Venetians in 1502. However, Venetian rule did not last, as Lefkada was given back to the Ottoman Empire one year later. Turkish rule over Lefkada lasted for over 200 years, from 1479 to 1684, when
Francesco Morosini attacked and subdued the island during the
Morean War. Lefkada, however, did not become officially Venetian until 1718, with the signature of the Treaty of Passarowitz.
Dissolution of the Republic and aftermath Napoleon Bonaparte declared war against Venice on 3 May 1797. The signing of the
Treaty of Campo Formio, on 17 October 1797, marked the dissolution of the Republic of Venice and the sharing of its territories between France and Austria. The lands of the ''
up to the River Adige, the city itself and the possessions of the Balkan peninsula of Istria and Dalmatia were yielded to Austria. The Ionian Islands, part of Venetian maritime territories, were ceded to France. Napoleon organized the islands into three departments: , , and . The first included the islands of Corfu and Paxos, as well as the former Venetian settlements of Butrint and Parga situated in Epirus. The French rule, however, did not last as Russia allied with the Ottoman Empire in September 1798 and in 1799 a Russo-Ottoman naval expedition captured the islands. With the signing of a treaty between Russia and the Porte on 21 March 1800, an independent island republic under the protection of both the empires was established. The name of the new state was agreed to be the "
Septinsular Republic"'' and included all the territories of the three former French departments except for the continental possessions of Parga,
Preveza,
Vonitsa and Butrint. With the
Treaty of Tilsit in 1807, the seven islands were given back to France by Russia. In October 1809, the United Kingdom took possession of all the islands with the exception of Corfu and Paxos, which was only surrendered in 1814. In 1815, the Ionian Islands became a British protectorate under the name
United States of the Ionian Islands. == Administration ==