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'œil" 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.