Castelnuovo Magra is mainly known for its ancient castle which was once the capital of the Bishop of Luni's domain. The castle had been originally built in the 12th century by Bishop Walter and then later completed by Henry of Fucecchio who developed the Code Pelavicino. Quite a lot of changes and additions have been made to the castle over the centuries. Today, visitors can see the remains of the large ancient walls, the masonry sections of the original castle and the large tower which had a rectangular plan.
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.