Fort Socoa in Ciboure was originally built under the rule of Henry IV to protect the region from the Spanish. Fort Socoa today was however built later under the reign of Louis XIII. In 1636, the Spanish army took the fort. A few years later, French sovereignty was restored.
In 1686, Vauban strenghtened the Fort and planned to build a pier to improve access to the Fort. The work of the fort was ended in 1698. The site housed a barracks and a chapel.
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.