The church of Lena was built around the year 1300 and consisted of nave, tower and vestry. Wall paintings were added in the early 16th century. The church's eastern part is a chapel where members of the family Bielke are buried. The altarpiece was made in 1491 by carpenter Lars Germundsson in Enköping.
Next to the near vicarage are ruins from the late Iron Age, namely, five burial mounds, a large number of stone formations and some runestones.
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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.