The tower and northern wall are the oldest parts of Aspö Church (dating from the 12th century). The chancel was completed in 1300s and the church was enlarged in 1400s. It has an interesting inventory; the fine iron-made door between nave and porch dates from the original church, font is from 1200s and the large altar triptych from 1472. There is also a runestone from the 1000s in the church porch.
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.