Château d'Arques-la-Bataille was originally a motte-and-bailey castle built to the steep hill around 1050. The castle was reconstruted in the 12th century. The long curtain wall and moat surrounded the Norman style donjon, a keep. The castle saw several battles and besieges during the centuries; the rebellion in 1052, Hundred Years' War and the most well-known in 1589 as part of the Wars of Religion. In 1688 the château was abandoned and later partially demolished and sold as the private property. Today the magnificent Château d'Arques-la-Bataille lies in ruins.
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.