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Origin and history

The citadel of Bonifacio is a military structure built gradually from the 12th century by the Republic of Genoa to secure its maritime trade between Liguria, Genoa and Sardinia, as well as to control the strait of the mouths of Bonifacio. Unlike a purely military citadel, Bonifacio was a president — a fortress inhabited by a population charged with both defending the city and maintaining economic activities there. This status made it the first Genoese president in Corsica, erected on a limestone plateau with vertical cliffs of 60 meters high, offering an unbeatable strategic position.

The story of Bonifacio dates back to 830, when the Count of Lucca Bonifacio, fighting the Saracens in Corsica on behalf of the pope, founded a castrum at the end of the plateau. The city developed around this original core, attracting merchants using the natural port of the Cartola. In the 11th century, Corsica became an issue between Pisa, Genoa and the archdiocese of Pisa, which exercised temporal and spiritual domination there after the victory over the Saracens in 1114. The Pisans built the first fortifications, but Genoa definitely stopped Bonifacio in 1195, replacing the Corsican population with genoese settlers to ensure its loyalty.

In the 13th century Bonifacio was the scene of rivalries between Genoa and Pisa, marked by ephemeral periods of peace (1217-1241 and 1247-1282). The Pisane defeat at the Battle of the Meloria (1284) sealed the Genoese grip on Corsica. In the 14th century, the city played a key role in the conflicts between Genoa, Aragon and Corsican lords. In 1344 she resisted a first Catalan attack, then became involved in the Geno-Aragonese war (1352-1355). Simone Boccanegra, Doge of Genoa, strengthened the genoese authority there to prevent the island from falling into the hands of rivals.

The citadel was modernized in the 16th and 17th centuries to resist the progress of artillery, notably after the Turkish siege of 1553, where the Ottoman guns fired 5,700 balls in 18 days, opening breaches in the ramparts. The Genoese added strongholds (such as the Stendard) and low ramparts to strengthen vulnerable flanks. In the 18th century, barracks and shops were built, including the Genoese barracks (1731), renovated for French troops in 1769. In 1815, a 250-metre wall was erected to separate the military part of the civilian city, partially destroyed in 1984.

The site houses remarkable elements such as the staircase of King Aragon (1420), built by Alphonse V to seat the city's siege, or the Saint Barthelomew well. The citadel was listed as a historic monument in 1929 and re-registered in 2023. Its strategic role continued until the 20th century, with the addition of a coastal battery (1888-1895) integrated into Corsica's defensive organisation, foreshadowing the island Maginot line.

Bonifacio also illustrates the demographic upheavals linked to the conflicts: its population fell from 5,000 to 700 inhabitants during the plague of 1528-1529. In turn occupied by the French, Turks and Austrians, the citadel symbolizes the struggles of influence in the Mediterranean, between merchant republics, Iberian kingdoms and Ottoman empires, while remaining a major architectural witness to the Genoese presence in Corsica.

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