Altsachsenheim castle was built in the 13th century as the headquarters of the lords of Sachsenheim. Around 1430 the castle was moved to the possession of the Nippenburg lords and in 1561 to the House of Württemberg.
References:It has been established that the castle was first build by the Lords of Remmingen whos property was further to the west . The ruins of their castle are still visible but very little is left. In between of those castles stands a tower that once was build as a watchtower and which enabled the Lords back then to collect toll from the ships down on the river Enz and the wagons passing on the road below.
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.