During the 1st century AD, Aregenua (Vieux) became the capital of the Viducasse tribe. Situated at the crossroads of two Roman roads it became an important commercial staging town. Aregenua and Lillebonne are the only two capital towns in Gallo-Roman Normandy that did not become Medieval towns. A number of buildings have been excavated, and some have been partially reconstructed.
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.