Eberbach Castle consists of three separate castles situated about 160 metres high above the river Neckar. It is assumed that the front castle was built in the last quarter of the 12th century, the middle castle ca. 1200 and the rear castle in the second quarter of the 13th century. In 1227 King Henry VII was given Eberbach Castle as a fief by the Bishop of Worms. Presumably the castles remained in the possession of the empire until 1330. After that, the castles were pledged to the palsgraves who subsequently used them as a bailiwick of the Electoral Palatinate.
In 1402 Ruprecht III of the Palatinate pledged the town and the castles to the knight Hans von Hirschhorn. In 1403 he obtained permission from the king to demolish and raze the castle, since presumably it was not of any use, but only entailed costs. He thus got rid of competitors for his castles in Hirschhorn and Zwingenberg. By and by the ruins were dismantled and their stones used for building projects in Eberbach, in particular for building walls to fend off game in order to protect the fields lying next to the woodland. Excavations in 1908-09 and 1927-28 exposed the remains of the front and middle castles, and some parts were reconstructed. From 1959-1963 systematic scientific research was carried out, and the rear castle was reconstructed in parts.
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.