In 1213, Jallanges belonged to René du Perray, a knight-banneret, and later to Jean Gaudin, a canon of Tours, in 1462. Built in 1465 by Louis XI for his treasurers, it was elevated to a castellany in 1631. The château features brick-and-stone Renaissance architecture, a 17th-century chapel (listed as a historical monument in 1946), a cedar park, a rose garden with 2,000 roses, a French Renaissance garden, and a gallery with trompe-l'œil frescoes dedicated to the Loire and Renaissance gardens.
Louis XI dismantled the original fortress to build a Renaissance-inspired château, reusing its materials. Over the centuries, it passed through numerous owners before being sold as national property in 1798. After neglect in the 20th century, it was purchased in 1984 by the Ferry-Balin family, who restored it and now host events and galas.
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.