The Dorëzi Fortress is the oldest in the Tirana county and dates to the 9th century BC. The first archaeological expedition was performed in 1951. The ruins of the fortress are to be found in one of the highest hills of the Krrabë, at about 479 metres above sea level. It is thought that Dimale may have been situated in the Dorëzi Fortress.
The surrounding wall is in its southern part, and is 300 metres long from east to west. The fortress construction seems to have had three phases—the first with raw stones, the second with carved blocks placed with no mortar (Hellenistic period) and the third with crushed stones and the use of mortar (4th–6th centuries AD). One can see the main entrance of the fortress. The presence of old vases that date to those centuries suggests that the site was inhabited until at least the 4th–6th centuries AD.
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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.