Steinsberg Castle was first mentioned in the year 1109. In the thirteenth century the owners of the castle were the Counts of Oettingen. Later the castle became home to the Counts palatine of the Rhein. In 1517 the castle was purchased by the Lords of Venningen. Shortly after this purchase the castle was burnt down during the Peasants' revolt. The rebellious peasants had to pay 5000 Gulden for the rebuilding of the castle. After heavy damage in 1777 by a strike of lightning the castle was left in disrepair. Since 1973 the castle has been owned by the Sinsheim council, who had large parts of the castle restored. The keep, the moat and the towers may still be viewed today.
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.