Strömsberg Ironworks was established in 1643-1645 by Flamish Welam Vervier and it was in use 275 years. The industrial village is very well-preserved. The wooden manor house was built in 1757-1758 by Charles De Geer. The bell tower dates from 1736 and blast furnace from 1723. The other buildings originate mainly from the 19th century.
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.