It is presumed that the Battenberg castle was constructed by Count Frederick III of Leiningen (d. 1287), and it remained a possession of the House of Leiningen - until 1689, when it was destroyed during the War of the Palatine Succession by French troops. Together with Neuleiningen Castle, on the opposite hillside 1,400 metres to the north, it controlled access to the Eckbach valley.
On three sides the outer walls of the castle follow the edge of the steep-sided hill spur. The wall on the fourth side was protected by a moat, now completely filled in. Surviving structures include: the outer walls, a gate tower on the western side near the northwest corner of the site, a battery tower with embrasure in the centre of the south side, and the vaulted cellar and foundations of a large dwelling. Attached to this is a staircase tower, erected in the 16th century, which is still standing.
The ruins are in private ownership but there is limited public access.
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.