One of the major landmarks in the Cittadella is the Cathedral of the Assumption , which is the seat of the Roman Catholic Diocese of Gozo . According to tradition , it stands on the site of a Roman temple dedicated to Juno , which was eventually converted to a Christian church dedicated to the Virgin Mary . The cathedral is believed to have been destroyed after the Maltese islands fell to the Arabs . A second church was built in the medieval period , and the earliest mentions of a parish church within the Cittadella date back to the 13th century . This church was enlarged in the 15th and 16th centuries , and it was damaged in the 1551 attack , although it was repaired within a few years . The building was damaged during the 1693 Sicily earthquake , and it was subsequently demolished to make way for the present structure , which is a Baroque building constructed between 1697 and 1711 to designs of Lorenzo Gafà , a Maltese architect who also built the Cathedral of Mdina on mainland Malta . Extensive remains of a Roman temple were found during construction , and some remains from this era still survive beneath the cathedral . The church became a cathedral with the establishment of the diocese of Gozo in 1864 . Today , the building is most famous for a remarkable trompe l'oeil on its ceiling , which depicts the interior of a dome that was never built . This was painted by the Sicilian artist Antonio Manuele . A small building behind the cathedral houses the Cathedral Museum
1693 Sicily earthquake
1693 Sicily earthquake
Cittadella (Gozo)