Rheinstein castle was constructed around 1316-1317. It was important for its strategic location. By 1344, the castle was in decline. By the time of the Palatine War of Succession, the castle was very dilapidated. During the romantic period in the 19th century, Prince Frederick of Prussia (1794–1863) bought the castle and it was rebuilt.
In 1975 the opera singer Hermann Hecher bought the castle. It's due to him that Rheinstein Castle became again one of the centres of attraction in the Rhine Valley. Around the apartment tower from the 14th Century you find neo-Gothic sets, turrets, terraces and iron stairs. Inside are stained glass windows and mural painting as well as a Renaissance fire-place and stylish furniture.
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.