Windeck 'old' Castle was built around 1200 by the lords of Windeck. The family, probably of Franconian origin and based in the Ortenau, owned wealthy allodial estates and held numerous fiefs from various liege lords, such as the empire, the Prince-Bishopric of Straßburg, the counts of Eberstein as well as the Vogtei of Schwarzach Abbey as an Afterlehen of the burgraves of Nuremberg. The first documentary evidence dates to 1212 when a certain Melchior von Windeck comes to light, and, in 1248, the lords of Windeck are mentioned in a document at Schwarzach Abbey as ministeriales of the Bishop of Straßburg. The castle itself, however, is first mentioned in 1335. It became a jointly-managed castle or Ganerbenburg very early on as a result of divisions of inheritance.
In the early 13th century the New Windeck Castle (Burg Neu-Windeck) was built by a branch of the family near Lauf within sight of Old Windeck. During the course of the 13th and 14th centuries, the lords of Windeck came into conflict many times with neighbouring territorial lords, the city of Straßburg and the counts of Württemberg in alliance with the Martinsvögel during the so-called Schlegler Wars, during which the castle was besieged, but never captured and so remained largely undamaged. In the late 14th century, however, it was stricken by a devastating fire. Stables and domestic buildings were razed, and the valuable archives, the basis of numerous legal titles, were destroyed. Reinhard von Windeck had the affected buildings rebuilt.
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.