Cittadella Duomo is a church constructed between 1774 and 1826, with two main contributing architects: Domenico Cerato and Ottavio Bertotti Scamozzi who created the Neoclassical façade. Carlo Barera completed the work in 1913.
The nave altarpieces include works by Leandro Bassano, Lattanzio Querena, Sebastiano Santi, and Michele Fanoli. In the Sacristy, is a Supper at Emmaus by Jacopo da Ponte, once found in the town's parish church. The sacristy also contains a Deposition attributed to Lazzaro Bastiani, a Flagellation attributed to Palma il Giovane, a Lament on the Dead Christ by Andrea da Murano, 17th-century Adoration of the Magi and Crucifixion. There is a Museum of Religious Art in the bell-tower.
The bell-tower houses a museum of precious sacred objects.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.