Prehistory and antiquity Although there is only limited evidence of
Neolithic remains in the Cittadella or Victoria, it is likely that the area has been inhabited since the
Stone Age, given its size and strategic position. Ceramics discovered inside the Cittadella suggest that the area was a settlement in prehistory. Archaeological remains such as pottery show that the site of the Cittadella was definitely inhabited during the
Bronze Age, in the
Tarxien Cemetery and
Borġ in-Nadur phases of Maltese prehistory. Bronze Age silos were discovered outside the Cittadella in the 19th century, suggesting that during this period the settlement was larger than the present-day citadel. The Victoria area remained the main settlement on Gozo throughout the
Phoenician and
Roman periods, and it became a settlement known as
Gaulos or
Glauconis Civitas. The city consisted of an
acropolis on the site of the Cittadella, and a fortified town in an area now occupied by part of Victoria. A temple dedicated to
Juno is said to have stood on the site now occupied by the
cathedral. A few inscriptions and architectural fragments from Gaulos have survived, including a 2nd-century AD Latin inscription on a limestone block that was reused in the main gate of the Cittadella. Remains of walls which might have formed part of the Punic-Roman fortifications of Gaulos have been discovered. In 1969, traces of massive walls were discovered during building works in Main Gate Street (), to the south of the Cittadella. Further remains were discovered close to the Cittadella during an archaeological excavation in 2017.
Medieval period During the medieval period, the Roman town was abandoned, and the acropolis was transformed into a castle. The first reference to the
castrum of Gozo dates back to 1241. It was sacked by the
Genoese in 1274, and a report on its fortifications was ordered two years later. At this point, one-third of Gozo's population lived in or around the Cittadella, and the island's inhabitants were required to spend the night within the citadel. By the end of the 13th century, the Cittadella housed noblemen from Sicily and mainland Italy who represented the
Count of Malta. The Cittadella was called
terra by the mid-14th century, and an administrative council known as the
Università was founded in 1350. In a testament of 1299 it was called
castri Gaudisii. Over time, the Cittadella became too small for the growing population, and by the 15th century the suburb of Rabat began to develop on the site of the Roman town. This settlement was surrounded by a wall with three gates known as
Putirjal,
Bieb il-Għajn and
Bieb il-Għarb. At this point Malta and Gozo were ruled by the
Crown of Aragon, and the Cittadella's fortifications were strengthened. The oldest surviving parts of the walls date back from this period. The largest attack on the Cittadella took place in July 1551, when a large Ottoman force, led by admiral
Sinan Pasha,
invaded Gozo and besieged the Cittadella. Governor
Galatian de Sesse offered terms of surrender, but they were refused, and the castle fell within a matter of days. The castle was then sacked, and most of the 6,000 Gozitans, who took refuge there, were taken as slaves. The attack left the castle in ruins, but it was rebuilt soon afterwards, although, initially, no efforts were made to modernize it. The Cittadella was undamaged during the
Great Siege of Malta in 1565. Although there had been proposals to demolish the castle and evacuate its inhabitants to
Sicily, the castle served an important role during the siege, as it maintained a communication link between besieged
Birgu and Christian vessels, and it also reported Ottoman movements to the Order. After the siege, Grand Master
Jean Parisot de Valette and military engineer
Francesco Laparelli visited the Cittadella in order to modernize it, but nothing materialized since at the time the Order was busy constructing its new capital
Valletta on mainland Malta. The Cittadella was attacked again by corsairs in 1583. In 1599, a major reconstruction of the Cittadella begun, under designs of the military engineer
Giovanni Rinaldini and under the direction of
Vittorio Cassar. The southern walls of the city were completely rebuilt as a bastioned
enceinte with a single
bastion and two demi-bastions linked by
curtain walls, along with two
cavaliers, a
ditch and
outworks. The castle remained the only fortified refuge against attack for the island's inhabitants until
Fort Chambray was built in the mid-18th century. Soon after the reconstruction was complete, the Cittadella's defences were again criticized. In the 1640s, plans were made to demolish the citadel and build a new fortress at
Marsalforn.
Mines were actually built under the bastions to destroy them, if necessary, but the demolition was never done. The engineer
Antonio Maurizio Valperga suggested to rebuild the wall around the suburb and further strengthen the Cittadella, but there were no funds for this proposal. By the early 18th century the Cittadella had assumed the role of a fortress, with a significant proportion of its houses falling into ruin or being in a poor state. An attack on Gozo took place in 1708, and, in 1715, the engineer Louis François d'Aubigné de Tigné made the same suggestions as Valperga, but a lack of funds prevented any work from being carried out.
French occupation and British rule obelisk near the Cittadella On 10 June 1798, the Maltese Islands were
invaded by the French. Troops led by
Jean Reynier landed near
Ramla in the early afternoon, and part of the 95th Demi-Brigade marched to the Cittadella. The fortress held out for some time, but by nightfall it fell to the invaders. The invasion was followed by a
French military occupation, but within three months discontent among the population led to revolt on the main island of Malta. The Gozitans rebelled on 3 September, and the French garrison withdrew to the Cittadella, until they capitulated on 28 October after some negotiations. A day later, the British transferred control of the Cittadella to the Gozitans, who set up a provisional government led by
Saverio Cassar and briefly administered the island as the independent state
La Nazione Gozitana. When the
Gozo Aqueduct was built between 1839 and 1843, a water reservoir was constructed in the Cittadella's ditch. A road leading from
it-Tokk to the Cittadella was constructed in 1854, allowing easier access to the fortified city. The
Royal Malta Fencible Regiment moved its Gozo headquarters from the Cittadella to Fort Chambray in 1856, and the fortifications of the Cittadella were decommissioned by the British on 1 April 1868. The Cittadella's fortifications and the ruined buildings within the city were included on the Antiquities List of 1925. During
World War II,
air raid shelters were dug under the bastions of the Cittadella.
Recent history The Cittadella's fortifications, including part of the medieval enceinte, are intact. The southern part of the city, where the cathedral and other buildings are located, is in good condition, but the buildings in the northern part are largely in ruins. Most of these ruins date back to the medieval period, and they contain archaeological deposits. Since 1998, the citadel has been included on Malta's tentative list of
UNESCO World Heritage Sites. In 2006, the first plans were made to restore the Cittadella, as part of a project that also included the restoration of the fortifications of
Valletta,
Birgu and
Mdina on mainland Malta. The restoration of the Cittadella consisted of two projects which were co-funded under the
European Regional Development Fund. The first was aimed at stabilizing and consolidating the fortifications and their underlying bedrock, This project was undertaken by the Restoration Unit at a cost of around €7 million. The second project was undertaken by the Ministry for Gozo between 2014 and 2016 at a cost of €14 million. The façades of the main buildings in the Cittadella were restored, while the ruins were acquired by the government and were cleaned and consolidated. The piazza and streets were paved, and the ditch was rehabilitated as a leisure area. A breach in the bastions was closed off with a door, and accessibility and safety measures were undertaken. The restored Cittadella was inaugurated on 30 June 2016. The Cittadella Visitors' Centre has won multiple local and international awards since its inauguration. During the course of restoration, various architectural features and archaeological remains were unearthed. A small structure consisting of two sets of stones in circular arrangements was discovered in Cathedral Square in December 2014. Its age and purpose are unknown. Bronze Age silos were also rediscovered. Parts of the Hospitaller fortifications which had been obscured by British interventions in the mid-19th century were also rediscovered during the restoration works. These include a ramp with a drawbridge which served as the original entrance to the fortress, and a sally port within a flank of St. Michael's Bastion. The archaeological discoveries were incorporated into the final design of the project. ==Architecture==