The strategic importance of the mountain crest across from Ehrenberg has been known for a long time. In 1632 the Swedes marched to the gates of Ehrenberg. Only years later, from 1639 to 1645, under the Tyrolean regent Archduchess Claudia Fort Claudia was built, and named after this princess. In 1703 Fort Claudia was taken by the Bavarians, who began the occupation of Ehrenberg from here. In 1782 the fortress was closed down. Even in the 19th century, the old fortress was inhabited, yet was left to decay after it was abandoned.
In 2014, the world's longest pedestrian suspension bridge was completed between the Ehrenberg Castle ruins and Fort Claudia, spanning the strategically important pass that these two structures were in part meant to guard. The length of the bridge 403 meters, with a height 110 meters.
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.