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. Hospitaller rule Emperor Charles V handed over Malta and Gozo to the Order of St. John in 1530. The Order was in a state of perpetual war against the Ottoman Empire, which had expelled it from its previous base at Rhodes in 1522. At the time the Cittadella was still a medieval castle, and it provided refuge for the Gozitans during Ottoman or Barbary attacks. The largest