The castle of Asklipio (Asklepieion) was built in 1479 by Grand Master D'Aubusson at the site of an ancient lighthouse. In the Byzantine period, during the time of the Knights, the castle also offered the inhabitants of the surrounding villages protection against enemy attacks.
It had rectangular bulwarks and two massive towers. Its only gate leads to the south-east corner tower. Two construction stages can be distinguished. Inside the castle there are preserved ruins of buildings and two tanks. This is the place where a significant inscription dated 1473 and referring to the activity of Roman Catholic priests in the area comes from.
The castle is easily accessible, and a number of signs direct the visitors all over the route on the winding mountain. It is also easily seen from the valley below and the main road. If you are there by car, just follow the signs and make sure you park your vehicle in the designated parking area.
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.