Entenstein Castle is a medieval castle surrounded by a moat situated in the center of the town of Schliengen. The origins of the castle can not be clearly dated. The first use of a building at this location can be traced to Walter of Schliengen in 821. By 1000 a tower house might have been in use. In the 13th century, Rudolf von Üsenberg (1207-1231) was the owner of the castle. The name of the castle derives from the German words 'Ente' and 'Stein', which means duck and stone. By 1525, Entenstein belonged to the nobles of Nagel von der Alten Schönstein and was thus transformed to a more representative manor house.
In 1725 Johann Conrad of Reinach-Hirtzbach, then Prince Bishop of Basel, bought Entenstein castle and used it as the seat of the Upper Bailiwick of Schliengen. In 1805, Entenstein Castle became a district site of the Grand Duchy of Baden. After 1857 Entenstein Castle which was then in the possession of the counts of Andlau, an old German noble house, was reconstructed. In 1970 Entenstein Castle was purchased by the Community of Schliengen and renovated thereafter. Since 1975 it funcitions as city hall of the community of Schliengen.
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.