Ravengiersburg Augustinian Canonical Foundation was founed in 1074 on the site of the Salian castle of the Counts in the Trechirgau. In the document dealing with land donations to the monastery, the name Hunsruche – Hunsrück – is mentioned for the first time.
The heyday of the monastery was during the 14th and 15th centuries. During this time, the monastery developed into one of the largest ruling estates in the entire region, whose possessions reached from the Nahe to the Mosel Rivers. The glory ended in the turmoil of the Reformation and the Thirty Years War, and from there began a varied and painful history that ended in the year 1631 with the almost complete destruction of the monastery and its church. However, Augustinian monks were still in charge there until secularization in the year 1803.
Today the St. Christophorus-Kirche has a Romanesque twin-tower façade. This imposing church is also called the Hunsrückdom (“Hunsrück Cathedral”), although it is not actually a cathedral.
The integrity and compactness of the architecture of the church makes it one of the most important structures of the 12th and 13th centuries between the Nahe, Mosel and the Middle Rhine River. The originally Romanesque church was erected around 1160 and must have been a three-nave basilica. It had approximately the same length as today's church and was attached to the double tower of the west works. Under the chancel section a four-nave Romanesque crypt with three apses from the first half of the 12th century was found. A disastrous fire, however, destroyed the Romanesque basilica around 1440. The new building was completed in the year 1497, probably a three-nave basilica in the Gothic style, nothing of which remained after its destruction by Swedish troops in 1631. The rebuilding from 1718-1722 was undertaken by Elector Carl Philippe upon the old foundations of the church using the available stone.
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.