The two castles of Kleinvernich and Großvernich have guarded the eastern and western banks of the river Erft since 1350. The two-part Grossvernich Castle, known as a 'castrum' with a moat, was built after 1300 near the surrounding wall, which today is hardly discernible.
Kleinvernich Castle is still entirely surrounded by a moat today. However, the estate is used exclusively for agriculture. The only memorial to the late-gothic castle in Grossvernich is the ruin of a tower which is in danger of collapse.
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.