Ettlingen castle was first mentioned in the 13th century. It has been destroyed several times over the centuries, rebuilt and expanded. In 1727 decided the Margravine Sibylla Augusta to use the castle as a retirement home. Johann Michael Rohrer created the Baroque palace from the castle ruins. Artists Riccardo Retti and Lucca Colomba equipped the rooms of sumptuous paintings and stucco. The great master of the late Baroque, Cosmas Damian Asam, created grand ceiling paintings on the castle chapel.
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.