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:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.