Pershyttan is a small mining town which has been restored and kept mainly as a working museum of Bergslagen's mining and iron handling which started in the early 14th century. One of Sweden's best preserved charcoal-fuelled blast furnaces from 1856 can be found in Pershyttan. In the area is there is also one of the biggest working water wheels.
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.