A Talayotic period settlement (1000-700 B.C.) in Trebalúger was a spectacularly large talaiyot; it is 28 metres in diameter at its widest point. It has an elliptical layout and was built on a high rocky outcrop on the site of an earlier structure from the Naviforme period dating from 1350 B.C., with the bases of the pillars still preserved inside. At the front of the monument, near the entrance, you can see the remains of a ramp that led up to the top of the talaiyot. Around the outside you can see the walls of a polygonal structure, also from the Talayotic period, which has been damaged by the lime kiln built over it at a later date.
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.