Nyon Castle is first mentioned in 1272, but probably dates back to the Lords of Prangins. It was rebuilt by Ludwig I of Savoy. The rectangular building was built in a variety of building styles. In 1463, it was extensively rebuilt. Following the Swiss Confederation invasion of Vaud in 1530, the Bernese bailiff was at Nyon. In 1574-80 the castle was converted into the seat of the bailiff. It remained the seat of the bailiff and was renovated several times in the following centuries.
Today Nyon Castle is a museum.
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.