Smlednik Castle was presumably built in the 12th century on the foundations of a prehistoric fort and a Roman stronghold of a later origin. The strategic location of the hill overlooking a crossing of the Sava River was appreciated by the first lords of the region, the Counts of Weimar Orlamunde, who built a defence tower on the hilltop in the 11th century. The tower was then expanded in several phases, but remained unaltered after 1610 and is thus the purest example of the architectural development of a mid-sized medieval castle in central Slovenia.
The famous Slovenian chronist Janez Vajkard Valvasor reffered to the Smlednik castle as a ruin already in the second half of the 17th century.
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.