The St. Henry's Chapel is a medieval wooden barn, which was surrounded by the present brick chapel in 1857. According the legend St. Henry, the first bishop of Finland, spent his last night in the barn before local peasant Lalli murdered him in 1156. Although according modern archeological investigations oldest parts of the barn were made in 1472-1473. Oldest records from the 17th century tells that the barn has been a destination for local pilgrimages.
Senate of Finland decided to protect the barn as the national heritage in 1839. Architect Pehr Johan Gylich designed the chapel around barn to shelter it. The chapel was inaugurated in 1857.
The chapel is open to the public in July with no admission fee.
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.